JPS63129789A - Television receiver - Google Patents

Abstract

PURPOSE:To store voice data at low cost by storing voice data in a part of an image memory. CONSTITUTION:A video signal is digitized by an A/D converter 8 and stored in the image memory 10, also a video signal is digitized by an A/D converter 7 and written similarly in the image memory 10. These are written when a switching device 9 is set in one position. By selecting either one of D/A converters 12, 13 by means of a switching device 11 simultaneously with the reading of either the image data or the voice data, the read-out image or voice data can be reproduced. Also, by shifting the switching device 11 at a high speed, a still picture of a schene of a picture can be displayed on a cathode-ray tube as reproducing voices of the explanation of the picture simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a television receiver capable of storing audio data.

(Prior Art) Television receivers having an image memory for recording images have been proposed, but none that record audio data. Therefore, it is possible to provide a dedicated memory to store the audio data, but this poses a problem in terms of cost.

[Purpose of the invention]

An object of the present invention is to provide a television receiver that can store audio data at low cost.

[Structure of the invention]

For this reason, in the present invention, a television receiver having an image memory is configured such that audio data can be stored in a part of the image memory.

〔Example〕

Examples of the present invention will be described below. FIG. 1 is a block diagram of the main parts of a television receiver according to one embodiment. 1
is a tuner which selects a predetermined channel from the television broadcast received by the antenna 2 and outputs the audio signal and video signal of that channel. 3 is an audio signal external input terminal, and 4 is a video signal external input terminal. 5 is a switch for switching between a TV audio signal and an external audio signal, and 6 is a switch for switching between a TV video signal and an external video signal. 7
is an A/D converter for digitizing audio signals, and its sampling frequency is, for example, 6 kHz, which is twice that frequency, when targeting audio signals up to 3 kHz.
has been selected. 8 is an A/D converter for digitizing the video signal, and its sampling frequency is 14MHz.
It is set to about. 9 is a switch for switching output data from the A/D converter 7.8. 10 is an image memory, 11 is a D/D/D/11 data read out from the image memory 10;
This is a switch for transmitting data to A converter 12 or 13. One D/A converter 12 is for audio signals, and the output signals thereof are finally reproduced by a speaker. The other D/A converter 13 is for video signals, and the output signals thereof are finally reproduced as images on a CRT.

Now, the video signal is digitized by the A/D converter 8 and stored in the image memory 10, and the audio signal is digitized by the A/D converter 9 and similarly written into the image memory 10. This writing is performed with the switch 9 switched to one side.

Here, regarding audio data, for example, if the sampling frequency is 6KHz as described above, one sampling data is represented by 10 bits, and if 100 seconds of audio is to be stored, a capacity of 6M bits is required. . Therefore, of the total capacity of the image memory 10, approximately 6M bits will be used for audio data.

Once stored image data or audio data is read out from there, if one of the D/A converters 12 and 13 is selected using the switch 11, the read audio or image can be played back. .

In addition, when reading image data and audio data at the same time, by switching the switch 11 at high speed, for example, while displaying one screen of images as a still image on a CRT, explanatory audio related to the still image can be played from the speaker. can.

This can be used for weather forecasts, cooking programs, English conversation, etc.

〔Effect of the invention〕

As described above, according to the television receiver of the present invention, audio data can be stored in a part of the already existing image memory, so that audio data can be stored at low cost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main parts of a television receiver according to an embodiment of the present invention.

Claims (4)

[Claims] (1) A television receiver having an image memory, characterized in that audio data can be stored in a part of the image memory. (2) A switching means for switching the input of audio data and image data is connected to the writing side of the image memory, and a switching means for switching the output of audio data and image data is connected to the reading side. A television receiver according to claim 1. (3) The television reception according to claim 1, characterized in that the sampling frequency of the A/D converter that obtains the audio data and the sampling frequency of the A/D converter that obtains the image data are different. Machine. (4) reading one frame of image data and audio data related to the image data from the image memory;
2. The television receiver according to claim 1, wherein an audio explanation of a still reproduced image is provided.