JPH0993499A - Video and audio data providing device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a video / audio data providing apparatus capable of providing real-time video. When an information output device 60 is requested to provide a television image, an input / output control unit 30 of the information providing device
Instruct the switching device 55 to the first state. The video encoder 52 converts the video signal input from the tuner 53 into a digital data string and then encodes it to output it as a video data string. The video packetizer 33 MPEs the video data string input via the switching device 55.
It is packetized according to the G standard and is output to the multiplexer 35 as a video packet sequence. The multiplexer 35 is
The video packet sequence and the audio packet sequence sent from the audio packetizer 34 are output to the head amplifier 37 through the output interface 36 as a video / audio stream according to the MPEG standard.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a video / audio data providing apparatus.

[0002]

2. Description of the Related Art Conventionally, a video / audio data providing apparatus which is sometimes called a video server or a media server is known. In this video / audio data providing device, a packetized video data sequence in which a video signal is converted into a digital data sequence in advance and then encoded and packetized is combined with a packetized audio data sequence in which an audio signal is converted into a digital data sequence and packetized. The basic function is to store a system stream in the form of a single video / audio data string in a storage means such as a hard disk, read it sequentially according to the user's request, and send it to the user (strictly speaking, the terminal device). there were.

[0003]

It can be said that the function of the conventional video / audio data providing apparatus is sufficient for providing video / audio data of, for example, a movie, but in the case of providing karaoke software as the video / audio data. Considering it, there were the following problems.

As is well known, in karaoke, karaoke lyrics are superimposed and displayed on a background image (usually a moving image), and music without singing is played in synchronization with the karaoke lyrics. However, since there is essentially no music that does not have a song, for example, a request to use a drama video of a TV broadcast as a background image or a news video of a TV broadcast while enjoying karaoke, etc. The video of was sometimes requested.

However, since the conventional video / audio data providing apparatus is configured to provide the video / audio data using the packetized video data sequence stored in the storage means in advance, the real-time video provision as described above is provided. I couldn't. The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to enable provision of real-time video in a video / audio data providing apparatus.

[0006]

As means for solving the above-mentioned problems, a video / audio data providing apparatus according to claim 1, wherein a video signal inputted from the outside is converted into a digital data string and then encoded to perform video encoding. A video signal encoder for forming a data stream, a video data packetizer for packetizing the video encode data stream to form a packetized video data stream, a packetized audio data stream in which an audio signal is digital data stream and packetized, and It is provided with a multiplexer for synthesizing the packetized video data sequence into one video / audio data sequence, and a transmitting means for transmitting the video / audio data sequence.

A video / audio data providing apparatus according to a second aspect is the video / audio data providing apparatus according to the first aspect,
Video data storage means for storing the video encoded data stream or packetized video data stream; video data reading means for reading the video encoded data stream or the packetized video data stream from the video data storage means; and the video signal A first state in which a video encoded data string from an encoder is led to the video data packetizer and the video encoded data string read by the video data reading means is led to the video data packetizer or read by the video data reading means. Switching means for switching the switched packetized video data sequence to a second state for leading to the multiplexer; and switching control means for switching the switching means to the first state or the second state. Characterize.

A video / audio data providing apparatus according to a third aspect of the present invention is the video / audio data providing apparatus according to the first or second aspect, further comprising packetized audio data string storage means for storing the packetized audio data string, and the packetized audio data string storing means. Packetized audio data string reading means for reading the packetized audio data string from the audio data string storage means is provided.

A video / audio data providing apparatus according to a fourth aspect is the video / audio data providing apparatus according to the first or second aspect, further comprising audio data string storage means for storing an audio data string in which an audio signal is converted into a digital data string. Audio data string reading means for reading the audio data string from the audio data string storage means,
An audio data packetizer for packetizing the read audio data string is provided.

A video / audio data providing apparatus according to a fifth aspect of the present invention is the video / audio data providing apparatus according to the third or fourth aspect, wherein the packetized audio data string reading means or the audio data to be read by the packetized audio data string reading means. It is characterized in that a specifying means for specifying the audio data string to be read by the data string reading means is provided.

The video / audio data providing apparatus according to claim 6 is the video / audio data providing apparatus according to claim 5,
The designating means designates the packetized audio data sequence or the audio data sequence requested by an output terminal receiving the provision of the video / audio data from the video / audio data providing device.

A video / audio data providing apparatus according to a seventh aspect is the video / audio data providing apparatus according to any one of the first to fifth aspects, wherein the video signal is derived from a broadcast wave.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the video / audio data providing apparatus according to claim 1 having the above structure, the video signal encoder encodes a video signal input from the outside into a digital data string and then encodes the video signal to obtain video encoded data. Make a column. The video data packetizer packetizes the video encoded data string into a packetized video data string. The multiplexer synthesizes the packetized audio data sequence and the packetized video data sequence in which the audio signal is converted into a digital data sequence into a single audiovisual data sequence. The sending means sends a video / audio data string.

As described above, the packetized video data sequence obtained by processing the video signal input from the outside is combined with the packetized audio data sequence and transmitted as one video / audio data sequence. , A video signal from a VCR, a video signal from a video camera, and the like can be processed to provide real-time video.

In the video / audio data providing apparatus according to the second aspect, the video data storage means stores the video encoded data string or the packetized video data string.
The video data reading means reads the video encoded data string or the packetized video data string from the video data storage means.

The switching means guides the video encoded data stream from the video signal encoder to the video data packetizer in the first state and the video encoded data stream read by the video data reading means to the video data packetizer. The packetized video data string read by the reading means is switched to the second state for guiding it to the multiplexer. The switching control means sets the switching means to the first state or the second state.

Therefore, the switching control means can provide a real-time image from the video signal encoder if the switching means is in the first state, and if the switching means is in the second state. Like the conventional video / audio data providing device, it is possible to provide a video that has been stored in advance.

In the video / audio data providing apparatus according to the present invention, the packetized audio data string storage means comprises:
Store a packetized audio data stream. The packetized audio data string reading means reads the packetized audio data string from the packetized audio data string storage means.

By inputting the packetized audio data sequence and storing it in the packetized audio data sequence storage means, a packetizer for packetizing the audio data sequence is unnecessary. In the video / audio data providing device according to the fourth aspect, the audio data string storage means stores an audio data string in which the audio signal is converted into a digital data string. The audio data string reading means reads the audio data string from the audio data string storage means. The audio data packetizer packetizes the read audio data string.

Since the audio data packetizer is provided, it is possible to input and store the digital data string-converted audio data string as it is. Therefore, the range of available audio data strings is expanded.
In the video / audio data providing apparatus according to the fifth aspect, the designating unit designates the packetized audio data sequence to be read by the packetized audio data sequence reading unit or the audio data sequence to be read by the audio data sequence reading unit. By designating a desired packetized audio data sequence or audio data sequence via the designating means, it is possible to transmit the video / audio data containing the desired audio data.

In the video / audio data providing apparatus according to the present invention, the designating means specifies the packetized audio data string or audio data string requested from the output terminal which receives the video / audio data from the video / audio data providing apparatus. specify. Therefore, the voice data can be transmitted in response to the user's request.

In the video / audio data providing apparatus according to the present invention, since the video signal originates from the broadcast wave, it is possible to process a video signal of a television broadcast such as a terrestrial wave or a satellite wave to provide a real-time video. Is suitable.

[0023]

SPECIFIC EXAMPLES The embodiments of the present invention will now be described in detail with reference to specific examples of the present invention. As shown in FIG. 1, an information providing system 10 of this specific example is configured by connecting an information supplying device 20 as a video / audio data providing device and an information outputting device 60 as an output terminal by a communication line 100 of a coaxial cable. Has been done. Although only one information output device 60 is shown in the figure, it is usual that a plurality of information output devices 60 are connected to one information supply device 20.

A management terminal 50 including a computer, a keyboard, a display, a printer, etc. (all not shown) is connected to the information supply device 20. The management terminal 50 is connected by the input / output interface 21, and various data and instructions can be input to the information supply device 20 via the management terminal 50.

The information supply device 20 is equipped with a video encoder 52 as a video signal encoder which converts a video signal supplied from the outside into a digital data string and then encodes it into a video encoded data string. The video encoder 52 of this specific example is provided with a tuner 53 as video signal input means, a terminal (not shown) for connecting a video deck, etc., and video signals from these devices are input to the video encoder 52. It is possible to input.
Normally, the video signal line of the tuner 53 is connected to the video encoder 52.

The output path from the video encoder 52 is
It branches into a path to the input interface 22 and a path to the switching device 55 as a switching means. A video data string as a video encoded data string input to the input interface 22 is transferred from the bus 24 to a video storage device control unit 25, and the video storage device control unit 25 causes the video storage device 26 as a video data storage unit.
a and 26b may be written and stored in a predetermined area, and may not be stored in the video storage devices 26a and 26b. Whether to store or not controls the entire control of the information supply device 20 and switching control. According to an instruction from the input / output control unit 30, which also functions as a means and a designation means. The input / output control unit 30 normally stores the video data in the video storage device 26.
The operation of each unit is controlled so as not to be stored in a and 26b, and when a storage process is instructed by the management terminal 50, the operation of each unit is controlled so that the video data is stored in the video storage devices 26a and 26b.

The video storage device controller 25 can read out the video data strings stored in the video storage devices 26a and 26b and transfer them to the video buffer memory 31. At this time, the video storage device controller. 25 functions as a video data reading means. The video data string input to the switching device 55 will be described later.

The audio encoder 54 as an audio signal encoder is a device for converting an audio signal supplied from the outside into a digital data string and then encoding it into an audio encoded data string. The audio encoder 54 is provided with terminals (not shown) for connecting the tuner 53, a video deck, etc., and audio signals from these devices can be input to the audio encoder 54. Normally, the audio signal line of the tuner 53 is connected to the audio encoder 52.

The output path from the audio encoder 54 is the path to the input interface 23 and the switching device 5.
It branches to the route to 7. Input interface 2
The audio data string as the audio encoded data string input to the audio data 3 is transmitted from the bus 24 to the audio storage device controller 27.
The audio storage device control unit 27 may or may not be stored in the audio storage device 28 as audio data storage means, and may or may not be stored in the audio storage device 28. Whether or not to do so depends on an instruction from the input / output control unit 30. The input / output control unit 30 controls the operation of each unit so that the voice data is not normally stored in the voice storage device 28, and when the storage process is instructed by the management terminal 50, the voice data is stored in the voice storage device 28. The operations of the above-mentioned respective parts are controlled so as to be performed.

Further, the voice storage device control section 27 can read the voice data string stored in the voice storage device 28 and transfer it to the audio buffer memory 32.
At this time, the voice storage device controller 27 functions as an audio data string reading means. The audio data string input to the switching device 57 will be described later.

The video buffer memory 31 can temporarily store the video data string sent from the video storage device controller 25 and output it in response to a request from the video packetizer 33. Similarly, the audio buffer memory 32 can temporarily store the audio data string sent from the audio storage device controller 27 and output it in response to a request from the audio packetizer 34.

The switching device 55, which is interposed between the video buffer memory 31 and the video packetizer 33, responds to an instruction from the input / output control unit 30 from the control line 59a to perform the following two operations.
Switch to two states. The first state is a state in which the video data string from the video encoder 52 is guided to the video packetizer 33 and the connection between the video buffer memory 31 and the video packetizer 33 is cut off. In the second state, the connection between the video encoder 52 and the video packetizer 33 is cut off,
In this state, the video data string from the video buffer memory 31 is guided to the video packetizer 33.

A switching device 57 interposed between the audio buffer memory 32 and the audio packetizer 34.
Like the switching device 55, switches to the following two states in response to an instruction from the input / output control unit 30 from the control line 59b. The first state is a state in which the audio data string from the audio encoder 54 is guided to the audio packetizer 34, and the connection between the audio buffer memory 32 and the audio packetizer 34 is cut off. The second state is a state in which the connection between the audio encoder 54 and the audio packetizer 34 is cut off and the audio data string from the audio buffer memory 32 is guided to the audio packetizer 34.

The video packetizer 33 as a video data packetizer can packetize the video data string sent through the switching device 55 according to the MPEG standard and output it as a video packet string to the multiplexer 35. The audio packetizer 34 as an audio data packetizer can packetize the audio data string sent via the switching device 57 according to the MPEG standard and output it as an audio packet string to the multiplexer 35.

The multiplexer 35 MPs the video packet string sent from the video packetizer 33 and the audio packet string sent from the audio packetizer 34.
It can be time-division multiplexed according to the EG standard and can be output to the head amplifier 37 through the output interface 36 as a single video / audio stream.

The head amplifier 37 as a sending means can high-frequency modulate the video / audio stream sent from the output interface 36 and send it to the communication line 100 through the channel instructed by the input / output control unit 30. . Further, the head amplifier 37 can send the signal sent from the modem 47 through the bidirectional communication channel and transfer the signal input from the communication line 100 through the bidirectional communication channel to the modem 47. .

The modem 47 is connected to the input / output control unit 30 via the bus 24, and the input / output control unit 30 receives the communication line 10 via the modem 47 and the head amplifier 37.
It is possible to send data to the information output device 60 connected by 0 and receive data from the information output device 60.

Next, the structure of the information output device 60 will be described. As shown in FIG. 2, the information output device 60 includes a central control device 61 as control means for controlling the operation of each part of the information output device 60. The central control device 61 is configured as a known microcomputer. An input device 63 having a keyboard (not shown) as an input means is connected to the central control device 61. When the input device 63 is operated, the central control device 61 is requested to request a karaoke song or a background video type. It is possible to input various instructions such as.

Further, the central control unit 61 is connected to the communication line 100 via a modem 62 as a communication means, and uses the above-mentioned bidirectional communication channel to input / output control unit of the information supply unit 20. 30 may be in communication. As a result, the request or the type of the background video input from the input device 63 is sent to the input / output control unit 30 to request the transmission of the video / audio stream for the karaoke song, for example. You can request to send.

Further, a tuner 64 as a receiving means is connected to the communication line 100. Tuner 64
Can select a channel in response to an instruction from the central controller 61, receive a video / audio stream transmitted through the selected channel, and transfer the video / audio stream to the system decoder 66.

The system decoder 66 receives the video / audio stream received and transferred by the tuner 64,
It is possible to separate the audio stream and the video stream, output the audio stream to the audio decoder 67, and output the video stream to the video decoder 68.

The audio decoder 67 can decode the audio stream into a digital data string and output it as an analog audio signal to the amplifier 69 by a built-in digital / analog conversion circuit (not shown). The amplifier 69 can amplify the audio signal and send the amplified audio signal to the speaker 70 as an audio output unit, and output the audio as a karaoke performance sound, for example. Note that the amplifier 69 has a mixing function, and when the microphone 71 is connected, the audio signal input from the microphone 71 and the audio signal from the audio decoder 67 can be mixed, amplified, and output to the speaker 70. . Accordingly, the speaker 70 outputs, for example, a sound in which the karaoke performance sound and the singing voice of the user are mixed.

The video decoder 68 can decode the video stream into a digital data string and output it to the monitor television 75 as an analog video signal by a digital / analog conversion circuit (not shown). The monitor television 75 can display an image based on the video signal.

Next, the video encoder 52 of the information supply device 20 receives the video signal derived from the television broadcast wave received by the tuner 53, and the audio encoder 54 originates from the television broadcast wave received by the tuner 53. The operation of the information providing system 10 will be described by taking as an example the case where the information output device 60 is used as a karaoke device when the audio signal to be input is input. (Operation 1) First, the case where the background image edited for karaoke is provided together with the karaoke performance sound will be described.

When the user of the information output device 60 uses the input device 6
3 is operated to request provision of a desired karaoke piece, the central control unit 61 sends a request for transmitting the audiovisual stream of the karaoke piece to the information supply apparatus 20 via the modem 62 and the communication line 100. Send.

In the information supply device 20, the input / output control unit 30
Receives this request through modem 47. next,
The input / output control unit 30 instructs the voice storage device control unit 27 to read and transfer the voice data string of the requested karaoke piece, and sets the switching device 55 to the second state.

Further, the input / output control unit 30, together with the instruction to the voice storage device control unit 27, is based on the genre of the karaoke song (type of enka, folk song, pops, rock, etc.). The video storage device controller 25 is instructed to read and transfer the video data string selected by 30, and the switching device 57 is set to the second state.

Further, the input / output control unit 30 instructs the head amplifier 37 on the channel for transmitting the video / audio stream of the requested karaoke song, and notifies the information output device 60 of the request of the channel. In the information output device 60, the central control device 61 instructs the tuner 64 to select the channel notified from the information supply device 20. In this way, the information output device 60 waits for the requested audiovisual stream to be transmitted through this channel.

On the other hand, in the information supply device 20, the video storage device control unit 25 reads the video data string from the video storage devices 26a and 26b according to the instruction of the input / output control unit 30 and transfers it to the video buffer memory 31 for audio. Storage device control unit 2
7 reads an audio data string from the audio storage device 28 and transfers it to the audio buffer memory 32 according to an instruction from the input / output control unit 30.

The video data sequence stored in the video buffer memory 31 is sequentially output, but since the switching device 55 is in the second state, this video data sequence is input to the video packetizer 33. The video packetizer 33 packetizes the input video data string according to the MPEG standard and outputs it as a video packet string to the multiplexer 35.

Similarly, the audio data string once stored in the audio buffer memory 32 is sequentially output to the audio packetizer 34 via the switching device 57 in the second state, and the audio packetizer 34 makes an MPEG.
It is packetized according to the standard and output to the multiplexer 35 as a voice packet sequence.

The multiplexer 35 MPs the video packet sequence sent from the video packetizer 33 and the audio packet sequence sent from the audio packetizer 34.
It is time-division multiplexed according to the EG standard and is output to the head amplifier 37 through the output interface 36 as a single video / audio stream.

The head amplifier 37 high-frequency modulates the video / audio stream sent from the output interface 36, and sends it to the communication line 100 through the channel instructed by the input / output control unit 30. In the information output device 60, the tuner 64 receives the video / audio stream and transfers it to the system decoder 66. The system decoder 66 separates the video / audio stream into an audio stream and a video stream, outputs the audio stream to the audio decoder 67, and outputs the video stream to the video decoder 68.

The video decoder 68 decodes the video stream into a digital data string and then outputs it as an analog video signal to the monitor television 75.
5 displays an image based on the video signal. This video stream is composed of a video data string based on a background video edited for karaoke, and the input / output control unit 3 of the information supply device 20.
0 is the selected video data string.

The audio decoder 67 decodes the audio stream into a digital data string and outputs it as an analog audio signal to the amplifier 69. Amplifier 69
Mixes the singing sound signal input from the microphone 71 and the audio signal from the audio decoder 67, amplifies the mixture, and outputs the amplified signal to the speaker 70. As a result, the speaker 70 outputs a sound in which the karaoke performance sound and the singing voice of the user are mixed.

At this time, the user can sing while watching the background image for karaoke displayed on the monitor television 75. The above is the operation of the information providing system 10 when enjoying karaoke in the same manner as in the past. (Operation 2) Next, a case where a television broadcast image is used as a background image of karaoke will be described. In this case, the operation relating to the transmission of the audio stream from the information providing device 20 and the output of the karaoke performance sound in the information output device 60 is the same as the above-mentioned (operation 1), and therefore the description thereof is omitted.

First, the user of the information output device 60 operates the input device 63 to request the provision of a desired karaoke piece, as in (Operation 1). However, this time, the user requests the provision of the television image as the background image of the karaoke piece. Then, the information output device 60 transmits a request for providing a television image as the background image together with the request for the karaoke piece.

In this case, the input / output control unit 3 of the information providing device
0 does not instruct the video storage device controller 25 to read the video data string, but instructs the switching device 55 to be in the first state. The video encoder 52 converts a video signal derived from a television broadcast wave, which is input from the tuner 53, into a digital data string and then encodes the video signal to output it as a video data string.

The video data string is input to the video packetizer 33 via the switching device 55 in the first state. The video packetizer 33 packetizes the input video data string according to the MPEG standard and outputs it as a video packet string to the multiplexer 35.

The multiplexer 35 MPs the video packet sequence sent from the video packetizer 33 and the audio packet sequence sent from the audio packetizer 34.
It is time-division multiplexed according to the EG standard and is output to the head amplifier 37 through the output interface 36 as a single video / audio stream.

The subsequent processing is the same as the above-mentioned (Operation 1). However, this time, the television image is displayed on the monitor television 75 of the information output device 60. In this way, if the user requests a television image in advance, the speaker 70
Since the karaoke performance sound is output from the monitor and the TV image is displayed on the monitor TV 75, the user can sing while watching the TV image. Therefore, the user can watch a real-time image such as a news image of a television broadcast while enjoying karaoke.

When the user requests the provision of the television image and the television sound, the input / output control unit 30 of the information supply device 20 responds to the request to the switching device 57 by the second.
It is also possible to provide a television image and television sound by instructing the state of. The above is an example in which the television image is provided in response to the user's request. However, in the information providing system 10, the information providing device 20 side can actively provide the television image or the like. Such an example will be described. (Operation 3) For example, when serious news such as an earthquake or a serious accident is being broadcast on television, the administrator of the information supply device 20 operates the management terminal 50 to switch the input / output control unit 30 to the switching device 55. To the first state. Then, the input / output control unit 30 first determines the video storage device control unit 25.
Then, the reading and transfer of the video data string is stopped and the switching device 55 is instructed to the first state. As a result, similarly to (Operation 2) described above, the video / audio stream including the video data string based on the TV video (for example, news) input from the tuner 53 to the video encoder 52 is addressed to the information output device 60. Sent out. Then, on the monitor television 75 of the information output device 60, for example, an image of news is displayed.

Therefore, for example, when serious news such as an earthquake or a serious accident is being broadcast on television, the image can be actively provided without waiting for the request from the information output device 60. It should be noted that TV audio can be provided together with TV video. As described above, the embodiments of the present invention have been described according to the specific examples. However, it is needless to say that the present invention is not limited to the specific examples, and can be variously implemented without departing from the gist of the present invention.

In a specific example, the information supply device 20 provides a voice data string for karaoke performance, and the information output device 60.
Although the example of being used as a karaoke device is shown, the information providing system 10 can be used for providing, for example, a movie in addition to providing karaoke information.

Further, in the specific example, the video of the television broadcast is provided, but in addition to the television broadcast, the video from the VCR, the video from the video camera, and the like from other devices may be provided. . Alternatively, in the specific example, the voice data sequence is stored in the voice storage device, and the voice data sequence read from this is packetized and transmitted. However, the voice data sequence is packetized in advance and stored in the voice storage means. If this is done, packetizing processing at the time of transmission is not necessary, and an audio packetizer is also unnecessary.

The communication between the video / audio data supply device and the output terminal is not limited to the communication using the coaxial cable as in the specific example, but can be wired or wireless. Further, not only electromagnetic communication but also communication using light as a medium is possible.

[0067]

As described above, according to the video / audio data providing apparatus of the first aspect, for example, the video signal of the television broadcast, the video signal from the VCR, the video signal from the video camera, etc. are processed. , Can provide real-time video.

According to the video / audio data providing apparatus of the second aspect, it is possible to provide a real-time video, and also to provide a pre-stored video like the conventional video / audio data providing apparatus. it can. In the video / audio data providing apparatus according to claim 3, since the packetized audio data sequence is input and stored in the packetized audio data sequence storage means, a packetizer for packetizing the audio data sequence is unnecessary. Become.

In the video / audio data providing apparatus according to the fourth aspect, since the audio data packetizer is provided, the audio data sequence converted into the digital data sequence is
It can be input as it is and stored. Therefore, the range of available audio data strings is expanded.

In the video / audio data providing apparatus according to the present invention, the video / audio data containing the desired audio data is specified by specifying the desired packetized audio data sequence or audio data sequence through the designating means. Can be sent out. In the video / audio data providing apparatus according to claim 6, since the designation means designates the packetized audio data sequence or the audio data sequence requested from the output terminal, the audio / video data is transmitted in response to the user's request. You can

In the video / audio data providing apparatus according to the seventh aspect, since the video signal originates from the broadcast wave, it is possible to process a video signal of a television broadcast such as a terrestrial wave or a satellite wave to provide a real-time video. Is suitable.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a specific example of an information providing system and a configuration of an information supply device.

FIG. 2 is a block diagram showing a configuration of an information output device as an output terminal of the information providing system of the specific example.

[Explanation of symbols]

10 ... Information providing system, 20 ... Information supplying device (video / audio data providing device), 25 ... Video storage device control unit (video data reading means), 26a, 26b ... Video storage device (video) Data storage unit), 27 ... Voice storage device control unit (audio data string reading unit), 28 ... Voice storage device (audio data string storage unit), 30 ... Input / output control unit (switching control unit, Designating means), 33 ... Video packetizer (video data packetizer), 34 ... Audio packetizer (audio data packetizer), 35 ... Multiplexer, 37 ... Head amplifier (sending means), 50 ... Management terminal, 52 ... Video encoder (video signal encoder), 53 ... Tuner, 54 ... Audio encoder Da, 55 ... switching device (switching means), 57 ... switching device, 60 ... information output device (output terminal) 75 ... monitor TV 100 ... communication line.

Claims (7)

[Claims] 1. A video signal encoder for converting a video signal input from the outside into a digital data string and then encoding the video signal as a video encoded data string, and a video for packetizing the video encoded data string into a packetized video data string. A data packetizer, a multiplexer for synthesizing a packetized audio data sequence in which an audio signal is converted into a digital data sequence and packetized, and the packetized video data sequence into one video / audio data sequence, and the video / audio data sequence A video / audio data providing device comprising: 2. The video / audio data providing apparatus according to claim 1, wherein the video data storage means stores the video encoded data stream or the packetized video data stream, and the video encoded data stream or the video data storage means from the video data storage means. Video data reading means for reading a packetized video data stream, a first state for guiding a video encoded data stream from the video signal encoder to the video data packetizer, and the video encoded data read by the video data reading means. Switching means for switching the column to the video data packetizer or for switching the packetized video data row read by the video data reading means to a second state, and the switching means. State or second state Video and audio data providing apparatus characterized by comprising a switching control unit that. 3. The video / audio data providing apparatus according to claim 1, wherein the packetized audio data string storage means stores the packetized audio data string, and the packetized audio data string storage means stores the packetized audio data. An audiovisual data providing device, comprising: a packetized audio data string reading means for reading a data string. 4. The audiovisual data providing apparatus according to claim 1, wherein the audio data string storage means stores an audio data string in which an audio signal is converted into a digital data string, and the audio data string storage means outputs the audio data string. An audio / video data providing device comprising: an audio data string reading means for reading a data string; and an audio data packetizer for packetizing the read audio data string. 5. The video / audio data providing apparatus according to claim 3, wherein the packetized audio data string to be read by the packetized audio data string reading unit or the audio to be read by the audio data string reading unit. A video / audio data providing device, characterized in that a specifying means for specifying a data string is provided. 6. The video / audio data providing apparatus according to claim 5, wherein the designating unit requests the packetized audio data string requested from an output terminal which receives the video / audio data from the video / audio data providing apparatus. Alternatively, a video / audio data providing device characterized by designating the audio data string. 7. The video / audio data providing apparatus according to claim 1, wherein the video signal is derived from a broadcast wave.