JPS58172011A - Channel selector - Google Patents

Abstract

PURPOSE:To select a specific channel of a CATV system by providing two input operation parts, two memories, and a memory selecting circuit, and selecting the 2nd memory when special operation is performed by the combination of those two input operation parts. CONSTITUTION:When a channel selection key for a desired channel CH is operated at an input operation part 1, a number corresponding to the CH is displayed on a display 2 on the basis of information from a controller 4 and then stored in the 1st memory 3 for general CH channel selection information storage under the command of the memory selecting circuit 9 to read tuning voltage information corresponding to the CH. This information is converted by a DA converter 5 into a tuning voltage, which is impressed to a terminal VT of a tuner 6 to receive a signal over the selected desired CH. When a special operation, is carried out at an input operation part 1-7 in combination, the specification of the circuit 9 is switched from the memory 3 to the 2nd memory 8 for specific CH channel selection information storage and tuning voltage information is read out of the memory 8 and converted by the converter 5 into a turning voltage, which is supplied to the tuner 6 to receive a signal over a specific CH.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a channel selection device for a television receiver.

Recent CATV in the United States
System development has been remarkable, and the number of transmission channels is increasing day by day. This makes it possible to receive a wide variety of distinctive programs on a single television receiver by selecting appropriate channels from a large number of channels.

However, on the other hand, an increasing number of these channels featured programs that parents would not want their children to watch, and families with small children were not happy about this increase in the number of channels. 0 The present invention has been made in view of these points, and provides a special channel selection device that cannot be used to select a specific channel using normal channel selection operations.

The present invention will be described below with reference to embodiments shown in the drawings. The drawing shows one embodiment of the present invention, in which reference numeral 1 denotes a first input operation section for inputting tuning information and tuning voltage information, and 2 displays the tuning information input from this operation section 1. 3 is a first memory that individually stores a plurality of digitized voltage information; 4 is a controller that controls the operation of each part based on the information input from the input operation unit l; 5 is a DA converter that converts the tuning voltage information read from the memory 3 into an analog tuning voltage, and 6 is a tuner, which usually constitute a general tuning device.

The channel selection operation of such a channel selection device is well known, but to briefly explain it here, first, turn on the channel selection key of the desired channel on the input operation section 1. Based on the information from the channel, the number corresponding to that channel is displayed, and the tuning voltage information corresponding to that channel stored in advance in the memory 3 is read out, and this is converted into a tuning voltage by the DA converter 5. Thereafter, the voltage is applied to the tuning chamber □ pressure supply terminal ②1 of the tuner 6, and thus the desired channel is selected and received by the tuner 6.

Here, by operating the preset key and the channel selection key of the input operation section 1, the tuning voltage information corresponding to each channel can be digitized and stored in each address of the memory 3 in advance.

The present invention is constructed by adding a second input operation section 7, a second memory 8, and a memory selection circuit 9 to the above-mentioned channel selection device. That is, here, it is assumed that tuning voltage information corresponding to a specific channel that is not normally viewed is stored in advance in the second memory 8 by operating each key of the second input operation section 7.

In a normal channel selection operation using the first input operation section 1, a command from the memory selection circuit 9 causes the read operation from the first memory 3 to be performed preferentially, and the read operation from the second memory 8 is not performed at all. shall not be allowed to do so.

Therefore, in this case, by simply turning on the channel selection key in the first input operation section 1, only the channel tuning voltage information stored in the first memory 3 can be read out. It is not possible to read the tuning voltage information of special channels stored in the .

When reading out the tuning voltage information of this special channel, only when a special operation is performed that combines the two input operation unit quantities 7, the memory selection circuit 9 is specified to switch from the first memory 8 to the second memory. At this time, the tuning voltage information is read from the second memory 8 and is supplied to the tuner 6 via the DA converter 5, and at this time, a specific channel is selected and received for the first time.

Note that the second input operation section 7 is separated from the first input operation section 1, and only the first input operation section 1 is placed in front of the receiver, and the second input operation section 7 is hidden. It would be even more effective if installed in a suitable location.

According to the channel selection device of the present invention, as described above, it has two input operation units and two memories, and normally, information on general channels and information on special channels are stored separately. It is not possible to select this special channel by simply performing general channel selection operations, so this device is particularly suitable as a channel selection device for receiving channels that always broadcast distinctive programs, such as CATV systems. Become.

[Brief explanation of drawings]

The drawing is a block diagram of one embodiment of the invention. 1... First input operation unit, 3... First memory, 7
. . . second input operation section, 8 . . . second memory, 9.
...Memory selection circuit.

Claims (1)

[Claims] 1. A first input operation unit that can perform a general channel selection operation, a first memory that individually stores information corresponding to the general channel, and a first input operation unit that can perform a general channel selection operation; a second input operation section that can perform a special channel selection operation in combination with the operation of the first input operation section; a second memory that stores information corresponding to the special channel; and a second memory that stores information corresponding to the special channel; a memory selection circuit that selectively switches the operation between the first memory and the second memory in response to the operation of the second input operation section; A channel selection device characterized in that a channel selection operation is disabled.