KR0141275B1 - Apparatus for controlling recording and displaying reproduction time of a video tape - Google Patents

Abstract

According to the present invention, the video tape recorder reads the entire recording time for the recording section through the recording start time and the end time set at the time of recording the video information and the audio information, and records them on the video tape. Provided is a playback time recording / display control apparatus of a video tape which reads the entire recording time recorded on the video tape and displays the screen as the total playback time.

Accordingly, in the present invention, the television broadcasting signal from the tuning means 16, 18 is signal-processed by the recording signal processing means 22, 24 by the mode switching operation of the mode switching unit 20 so that the switching unit The video information and audio information recorded on the video tape via the signal recording / reading unit 28 via the signal 26 are reproduced by the reproduction signal processing means 30, 32 for signal processing. A video recording / reproducing apparatus for outputting video and audio from the CRT apparatus and the speaker through the video output unit 34 and the audio output unit 36; In addition to key setting of the recording start time and recording end time according to the recording function, the function setting unit (2) for keying the command of the playback operation according to the playback function is keyed through the function setting unit (2). In addition to encoding the calculated recording time, the storage unit 6 storing code control data for reading the recording time code data read out from the video tape and converting the variation of the reproduction time for the corresponding recording section can be converted. Rotation of the drum motor 42 and the capstan motor 46 by the driving of the reference pulse generator 8, the drum servo circuit 40, and the camstan servo circuit 44, which generates a reference pulse for time-keeping While the recording function and the playback function are controlled through the recording function, the recording start time and the recording time required according to the recording function are recorded on the video tape as coded data. In addition, according to the playback function, the control unit 10 controls the display time to be displayed on the CRT apparatus by reading the reproduction time required through the code data of the recording time read from the video tape, and under the control of the control unit 10. A code signal processor 12 which receives code data for the recording time and generates a code signal recordable on a video tape, and converts a code signal read from the video tape into a form of code data that can be read; The code signal recording / reading unit 14 for recording the code signal from the code signal processing unit 12 on the video tape and reading the code signal recorded on the video tape, and the control of the control unit 10. And an OSD signal processor 38 for generating character information for screen display of reproduction time.

Description

Video tape playback time record / display control device

1 is a block diagram showing a playback time recording / display control apparatus of a video tape according to the present invention;

2 is a schematic diagram showing an example in which the playback time of a videotape is displayed on a CRT apparatus according to the operation of the present invention;

3 is a flowchart illustrating the operation of a recording time recording function during recording according to the present invention;

4 is a flowchart for explaining the operation of the playback time display function during playback according to the present invention.

* Explanation of symbols for main parts of the drawings

2: Function setting part 4: Key setting input part

6: memory 8: reference pulse generator

10 control unit 12 code signal processing unit

14: code signal recording / reading unit 16: tuner

18: video IF amplifier 20: mode switching unit

22: recording signal processor 24: recording signal amplifier

26: switching unit 28: signal recording / reading unit

30: playback signal amplifier 32: playback signal processor

34: video output unit 36: audio output unit

38: OSD signal processor 40: drum servo circuit

42: drum motor 44: capstan servo circuit

46: capstan motor 48: drum torque pulse generator

50: capstan torque pulse generating unit 52: pulse counting unit

The present invention relates to an apparatus for recording / displaying a playback time of a video tape, and more particularly, to recording an entire recording time at the time of recording in a video tape recorder on a video tape, and to recording the entire recording recorded on the video tape during playback. The present invention relates to a playback time recording / display control apparatus of a video tape that enables screen display of the entire playback time through time.

Currently, in the video tape recorder which is generally used, the CRT apparatus records predetermined video information and audio information on the magnetic recording surface of the video tape through a recording operation, or reads already recorded video information and audio information through a playback operation. In addition to the video output box, audio is output from the speaker, and is inserted into the tray, which is wound on the video cassette reel and rotated by the driving of the capstan motor. The recording / reproducing operation is performed by rotating the rotating drum provided with two or four head magnetic heads at a high speed by the oblique scanning method through recording.

In addition, such a video tape recorder currently controls television broadcasting of a predetermined channel tuned through a tuner built-in or a tuner of a television by operating a remote control for remote control or a function key of a matrix button provided on the control panel side of the main body. While recording or scheduled recording is performed, the recording start and recording end operations can be performed by inputting a recording start command and a recording end key command during the current recording of a predetermined television broadcast program. If the channel number and recording time for the program are set, that is, the recording start time and the recording end time, the television program of the set channel is recorded according to the elapse of the recording start time, and the recording end time As a result, the recording operation is stopped.

However, at the present time, when the video information and audio information recorded on the video tape are reproduced by the current recording or reservation recording function, it is impossible to check the total reproduction time or the remaining time required for the reproduction of the corresponding recording section. Therefore, inconvenience such as difficulty in time-sharing the viewing time with the television broadcast which the viewer should watch or not being able to easily adjust the time with the bedtime at night.

Accordingly, the present invention has been made in view of the above-mentioned inconvenience. The video tape recorder reads the entire recording time for the recording section through the recording start time and end time set at the time of recording the video information and the audio information. It is an object of the present invention to provide a playback time recording / display control apparatus of a video tape which reads the entire recording time recorded on the video tape and displays the screen as the total playback time in addition to recording on the recording section.

According to the playback time recording / display control apparatus of a video tape according to the present invention for achieving the above object, the television broadcasting signal from the tuning means is recordable by the recording signal processing means by the mode switching operation of the mode switching unit. The signal is processed and recorded on the video tape through the signal recording / reading unit via the switching unit. The video information and the audio information recorded on the video tape are signal-processed so as to be reproduced by the playback signal processing unit, so that the video output unit and audio output are performed. A video recording / reproducing apparatus for outputting video and audio output from a CRT apparatus and a speaker through a unit; A function setting unit for keying the recording start time and the recording end time according to the recording function, and keying the command of the playback operation according to the playback function, and encoding the estimated recording time calculated by key setting through the function setting unit. In addition, the control unit stores code control data for reading the recording time code data read out from the video tape, and generates a reference pulse for time display to convert a change in the reproduction time for the corresponding recording section. The recording and playback functions are set according to the recording function while controlling the recording and playback functions through the rotation of the drum motor and the capstan motor driven by the reference pulse generator, the drum servo circuit and the camstan servo circuit. The recording time recognized by the recording is recorded on the video tape as coded data, and the playback function The control unit reads out the playback time from the code data of the recording time read from the video tape and controls the screen to be displayed on the CRT device. The code data of the recording time is received under the control of the control unit. A code signal processing unit for generating a recordable code signal on the tape and converting the code signal read from the video tape into a form of readable code data, recording the code signal from the code signal processing unit on the video tape; In addition, a video signal recording / reading unit for reading a code signal recorded on the videotape and an OSD signal processing unit for generating character information for screen display of reproduction time required under the control of the control unit Provided is a playback time recording / display control device.

According to the present invention made as described above, if the recording start time and the recording end time are set for a predetermined television broadcast program which is the object of the current recording or the scheduled recording, the recording start time and the recording end time Through the calculation of the recording time required for the corresponding recording section, it is recorded on the recording surface of the video tape in the form of a coded signal immediately before the recording operation, and the code signal of the recording time required when the video tape is reproduced is read out. As the playback time, not only the total time and the remaining playback time (playback time) are displayed on the CRT device, but also the playback time of the corresponding video tape is rewound or fast-forwarded. So that the remaining playback time (playback time) is corrected and displayed on the screen. And there.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an apparatus for recording / displaying a reproduction time of a video tape according to the present invention. In the apparatus of the present invention, reference numeral 2 denotes a matrix button provided in a remote controller for remote control or a predetermined portion of a control panel of a main body. Key to set the recording start time and the recording end time for the television program to be recorded at the time of the current recording or the scheduled recording, as well as the playback commands and the rewind and fast forward function commands according to the playback functions. 4 denotes a key setting input unit which receives the key setting signal by the key setting of the function setting unit 2 and decodes it recognizably.

In addition, reference numeral 6 denotes a storage unit consisting of, for example, a PROM in which code recording time according to the recording start time and recording end time is coded, and code control data for reading coded data is stored, and 8 is a crystal oscillator. The reference oscillation generator which generates a reference clock pulse for time-keeping with the same oscillation pulse generator is shown.

Also, the reference numeral 10 receives a recording function command for the current recording or the scheduled recording from the function setting unit 2 through the key setting input unit 4 to control the current recording or the scheduled recording function to be performed. The recording start time and the recording time required for calculating the recording end time input at the time of setting the recording function are generated as code data based on the code control data of the storage section 6 so as to be recorded on the recording surface of the video tape. Is controlled so that a recording operation is performed, and when a reproduction function command for a reproduction operation is inputted by the function setting unit 2, a code signal of a recording time required to be read on the recording surface of the video tape is read. A control unit for controlling the display on the CRT device by reading based on the code control data.

Reference numeral 12 converts the code data of the recording time required by the control unit 10 into a code signal of an analog form recordable on a video tape, and converts the code signal read on the video tape. A code signal processing unit converts the code signal into a form of code data in a digital form recognizable by the control unit 10. 14 denotes a code signal from the code signal processing unit 12 magnetically recorded on a recording surface of a video tape. A code signal recording / reading section comprising a magnetic head for reading a code signal recorded on the videotape.

Also, reference numeral 16 denotes a tuner for tuning the corresponding channel by receiving tuning data for tuning the channel to be recorded from the controller 10 and built in the video tape recorder. And an image IF amplifier for amplifying the intermediate frequency of the television signal.

Reference numeral 20 denotes a mode switching unit for mode switching under the control of the controller 10 to enable recording or reproduction of a video signal and an audio signal for performing a playback function or a recording function.

In addition, reference numeral 22 denotes a recording process of RF conversion of a video signal and an audio signal according to a television broadcast from the video IF amplification unit 18 through the mode switching unit 20 according to a recording function so as to record and signal-process the signal. 24 shows a signal processing section for recording and amplifying the video signal and audio signal of the signal-processed television broadcast.

Reference numeral 26 denotes a switching unit which is controlled by the control unit 10 and switched so as to perform a recording operation or a reproduction operation in the signal recording / reading unit 28 described later, and 28 denotes a video signal and an audio signal to be recorded. At least two video recording / reading magnetic heads and at least two audio recording / readings to magnetically record the video and audio signals recorded on the videotape, as well as magnetic recording on the recording surface of the videotape. A signal recording / reading section consisting of a magnetic head for picking up is shown.

In addition, 30 denotes a reproduction signal amplifier for reproducibly amplifying the video signal and the audio signal read by the signal recording / reading unit 28 through the switching unit 26, and 32 denotes the amplified video signal and audio. A reproduction signal processing unit for reproducing a signal for signal reproduction is shown.

Reference numeral 34 denotes an image output unit for outputting the image signal of the television broadcast tuned through the tuner 16 or the video signal read out from the video tape to the CRT device side, and 36 denotes the tuned television broadcast. An audio output section for outputting an audio signal or an audio signal read out from a video tape to a speaker is output.

Further, reference numeral 38 denotes character information for OSD display on a CRT apparatus of a reproduction time required for a recording section of the video information and the audio information read out from the video tape under the control of the controller 10 and reproduced on the screen. An OSD signal processor is generated.

In this case, the OSD signal processing unit 38, as shown in Figure 2 (A) and (B), the playback time displayed on the CRT apparatus is the total time required for the corresponding playback section (e.g., total time). 90 minutes), the remaining information on the remaining playback section (e.g., 30 minutes remaining) and the signal information corresponding to the playback elapsed time (e.g., 60 minutes past) for the already reproduced playback section. Done.

In addition, the OSD signal processor 38 causes the remaining playback time shown in FIG. 2A or the playback elapsed time shown in FIG. 2B to be selected by a key operation of the function setting unit 2. It is preferable to process the signal so that the screen can be selectively displayed under the control of the control unit 10 that receives the input.

Further, reference numeral 40 denotes a drum which is servo-operated for driving the drum motor 42 which rotates the rotating drum provided with the signal recording / reading unit 28 at the time of the playback function or the recording under the control of the controller 10. The servo circuit 44 is controlled by the control unit 10 to rotate the capstan motor 46 forward / backward for rewinding or fast forwarding during the playback or recording function. The capstan servo circuit which operates the servo to be moved is shown.

In this case, the control unit 10 does not read the code signal from the code signal recording / reading unit 14 during the reproducing function, and when there is no input of code data through the code signal processing unit 12, the capstan servo circuit (44) is controlled to be a rewind operation by the servo operation for the reverse rotation of the capstan motor 46, so that the rewind operation is continuously performed until the code signal reading / reading unit 14 to read the code signal It is desirable to control.

In addition, reference numeral 48 denotes a drum torque pulse generator that generates torque pulses in proportion to the rotational torque caused by the rotation of the drum motor 42, and 50 denotes rotational torque according to forward / reverse rotation of the capstan motor 46. Camston torque pulse generating unit for generating a torque pulse in proportion to, 52 is input to the torque pulse generated in the capstan torque pulse generator 50 and the torque pulse generated in the drum torque pulse generator 48, respectively A pulse counting unit that receives and matches pulses is shown.

Here, when the key setting command for rewinding or fast-forwarding is input by a key operation of the function setting unit 2 during the reproducing operation according to the reproducing function, the drum servo circuit 40 is input. While controlling the servo operation for rewinding or fast-forwarding the normal capstan servo circuit 44, the reproducing time according to the reproducing section changed by rewinding or fast-forwarding through the torque pulse counted by the pulse counting unit 52 is controlled. Based on the reference pulse generated by the reference pulse generator 8, the control is performed so that the screen is displayed by correcting the remaining reproduction time and the reproduction elapsed time of the reproduction time required.

Next, the operation of the present invention made as described above will be described in detail with reference to the flowcharts of FIGS. 3 and 4.

First, the recording time recording function at the time of recording according to the present invention will be described in detail with reference to FIG.

First, in step 60, if the function setting unit 2 is key operated to input the recording start time and the recording end time for the television program to be recorded when the key is set for the current recording or the scheduled recording, the operation proceeds to step 61. The controller 10 receives the recording start time and the recording end time to calculate and determine a predetermined overall recording time.

Subsequently, the flow advances to step 62 where it is determined whether or not key setting data for starting the recording function is input by the key operation of the function setting section 2, and recording starts through the key setting input section 4; If it is judged that the key setting data is input, the control proceeds to step 63 to generate code data of the recording time required based on the code control data of the storage unit 6, and to the code signal processing unit 12. Will print.

Accordingly, the code signal processing unit 12 receives the code data and converts the code data into a code signal recordable on the video tape, and the code signal recording / reading unit 14 converts the code signal on the recording surface of the video tape. Will be recorded.

In addition, in step 64, the control unit 10 outputs the tuning data for tuning the television broadcast of a predetermined channel to the tuner 16, and causes the mode switching unit 20 to switch the mode to the recording mode. The switching unit 26 is controlled to switch to the recording signal amplifier unit 24 side.

Accordingly, the television broadcast signal tuned by the tuner 16 is amplified by the image intermediate frequency by the image IF amplifier 18, RF-modulated by the record signal processing unit 22, and then signal-processed to be recorded. The signal is amplified by the amplifier 24 and recorded on the recording surface of the video tape by the signal recorder / reader 28.

On the other hand, in step 65, the controller 10 determines whether the key operation for stopping the recording of the function setting unit 2 is performed at the time of the current recording or whether the recording end time has elapsed at the time of the reserved recording. .

As a result of the determination in step 65, when it is determined that the key operation for recording stop of the function setting unit 2 is performed or the recording end time at the time of reserved recording is elapsed, the control proceeds to step 66 so that the recording operation is terminated. Control.

Next, with reference to FIG. 4, the reproduction time display function during reproduction according to the present invention will be described in detail.

First, in step 67, the control unit 10 waits for the playback of the recorded video tape. In step 68, the control unit 10 proceeds to step 68. The key setting data for starting the playback function by the key operation of the function setting unit 2 is performed. Determines whether is input.

As a result of the determination in step 68, if the control unit 10 determines that key setting data for starting the playback function is input by the key operation of the function setting unit 2, the control proceeds to step 69 and the code It is determined whether or not the code data from the code signal processing unit 12 is inputted by the read operation of the signal recording / reading unit 14.

If it is determined in step 69 that the code data from the code signal processing unit 12 is not being input, then control proceeds to step 70 where, for example, a key operation is performed again to start playback or a key for a still function. If it is determined whether the key operation for other functions such as operation is performed and it is determined that the key operation for the other functions is not performed, then control proceeds to step 71 in which the capstan motor 46 is rotated in reverse. In order to control the servo operation of the capstan servo circuit 44 so as to perform the rewinding operation, the process proceeds to step 69 again.

However, as a result of the determination in step 70, the control unit 10 indicates that a key operation for the reproduction function of the function setting unit 2 is performed, or a key operation for other functions such as a key operation for the still function is performed. If it is determined that the control proceeds to step 72, the display function for the playback time is prohibited and other function operations such as a playback function or a still function are performed.

On the other hand, as a result of the determination in step 69, the control unit 10 reads the code signal of the recording time required for the predetermined recording section recorded on the recording surface of the video tape by the code signal recording / reading unit 14 to perform a code signal processing unit ( If it is judged that the data is recognizably inputted through 12), control proceeds to step 73 where the code data is read based on the code control data of the storage unit 6.

In step 74, the mode switching unit 20 switches the mode to the playback mode, the switching unit 26 switches to the playback signal processing system side, and records the read recording time. By setting as the playback time required for playback of the section, the OSD signal is displayed on the CRT apparatus as the entire time and the remaining time (or past time) through the signal processing operation of the OSD signal processor 38, while the reference pulse generator 8 On the basis of the reference pulse generated in the time remaining (that is, the remaining playback time) or the past time (that is, playback elapsed time) is consistently displayed with the playback state.

In this state, the flow advances to step 75 where it is determined whether the key setting data is inputted by determining whether the key setting data for rewinding or fast forwarding the video tape to be played back is input. When the control proceeds to step 76 to control the servo operation of the drum servo circuit 40 and the capstan servo circuit 44 so that the drum motor 42 and the capstan motor 46 are rotated for rewinding or fast forwarding. Done.

Accordingly, in step 77, a torque pulse proportional to the rotational torque of the drum motor 42 and the capstan motor 46 is generated in the drum torque pulse generator 48 and the capstan torque pulse generator 50, thereby generating a pulse. When the counting unit 52 counts the torque pulses consistently, the control unit 10 receives the count result value from the pulse counting unit 52 and the reference from the reference pulse generating unit 8. On the basis of the pulse, the change value of the reproduction time for the corresponding recording section is converted. In step 78, the OSD signal processor 38 is controlled to change the time, ie, the remaining time (or the past time), on the CRT apparatus. This causes the OSD to change.

Subsequently, the process proceeds to step 79 where it is determined whether the end time of the entire playback time for the recording section of the playback object, i.e., the remaining time has elapsed by 0 minutes, and the end time of the entire playback time has elapsed. If the control proceeds to step 80, the entire time displayed on the CRT device and the remaining time (past time) are displayed on the CRT device, and the playback time set for the corresponding recording section is released.

According to the present invention described above, when recording a predetermined television broadcast, the entire recording time is recorded as a code signal on the video tape, and the code signal recorded in the reproduction function of the video tape is read. As a result, the screen is displayed as the playback time, which has the advantage of providing convenience to the user.

Claims (5)

By the mode switching operation of the mode switching unit 20, the television broadcast signals from the tuning means 16 and 18 are signal-processed to be recorded by the recording signal processing means 22 and 24 so as to mediate the switching unit 26. The video recording and recording information is recorded on the video tape through the signal recording / reading section 28, and the video information and the audio information recorded on the video tape are signal-processed by the reproduction signal processing means 30 and 32 so as to be reproduced. 34) In the video recording / playback apparatus which allows video output and audio output from the CRT apparatus and the speaker through the audio output unit 36, the recording start time and the recording end time according to the recording function are set as well as the playback. A function setting unit (2) for keying a command of a playback operation according to a function; and a recording time duration code read out on a video tape while encoding a recording time calculated by key setting through the function setting unit (2). To read the data A storage unit 6 having stored therein code control data, a reference pulse generating unit 8 for generating a reference pulse for time display so as to convert a variation in reproduction time for the corresponding recording section, and a drum servo circuit 40 And the recording and playback functions by the rotation of the drum motor 42 and the capstan motor 46 by the driving of the camston servo circuit 44 and the recording start time and the recording set according to the recording function. The recording time recognized by the end time is recorded on the video tape as coded data, and the playback time is read through the code data of the recording time read out from the video tape according to the playback function. Control unit 10 for controlling the display on the CRT device, under the control of the control unit 10 can receive the code data for the recording time required to record on the video tape A code signal processing unit 12 for generating a code signal and converting a code signal read from the video tape into a form of code data readable, and recording the code signal from the code signal processing unit 12 on the video tape. In addition, a code signal recording / reading unit 14 for reading a code signal recorded on the video tape, and an OSD signal processing unit for generating character information for screen display of playback time under the control of the control unit 10. A playback time recording / display control apparatus for a videotape, comprising: (38). 2. The code signal recording / reading unit (14) according to claim 1, wherein the control unit (10) is arranged on the recording surface of the video tape corresponding to immediately before the start of the recording operation by the signal recording / reading unit (28) in the recording function. And a code signal of a recording time required by the recording operation of the recording tape. The reverse rotation servo of the capstan servo circuit 44 according to claim 1 or 2, wherein if the code signal is not read by the code signal recording / reading unit 14 during the reproducing function, the controller 10 performs the reverse rotation servo of the capstan servo circuit 44. Capstan motor (46) is reversely rotated by the control to control the video tape to the rewinding operation to the reading point of the code signal. The character information displayed on the CRT apparatus by the signal processing operation of the OSD signal processor 38 includes character information corresponding to the total time of the reproduction time, the remaining reproduction time, and the reproduction elapsed time. And a playback time recording / display control apparatus for a video tape. 3. The torque according to claim 1 or 2, wherein the drum torque generating portion 48 generates torque pulses according to the rotational torque of the drum motor 42, and the forward / reverse rotation torque of the capstan motor 46. And a pulse counting unit 52 for counting torque pulses generated by the drum torque generating unit 48 and the capstan torque generating unit 50, respectively. When the rewinding or fast-forwarding operation is performed during the reproducing operation according to the reproducing function, the control unit 10 receives the torque pulse counted by the pulse counting unit 52 and receives the reference pulse from the reference pulse generating unit 8. And a playback time recording / display control apparatus for a video tape, characterized in that the control is performed to correct the remaining playback time and the playback elapsed time of the playback time by converting the changed time as a basis.