KR20020006314A - Digital television - Google Patents

Abstract

PURPOSE: A digital TV, which records and reproduces program and additional information of digital broadcast using an existing VCR, and which stores compressed digital signals in a VCR tape, is provided to maximize the quantity of data capable of being stored in one tape. CONSTITUTION: A digital TV includes a tuner(1) for tuning signals of one channel from signals received through an antenna, a demodulator(2) for demodulating the tuned signals, and a channel decoder(3) for sorting the demodulated signals by data streams. The digital TV further has a demultiplexer(4) for classifying the sorted data streams, an audio decoder(5) for decoding audio signals among the demultiplexed signals to output the decoded audio signals to a speaker(6), and a video decoder(7) for decoding video signals among the demultiplexed signals. The digital TV also includes an additional information processor(10) for decoding an additional information signal among the demultiplexed signals, and a signal synthesizer(8) for synthesizing the decoded video signals and additional information signal to output the synthesized signals to a display(9).

Description

Digital TV {DIGITAL TELEVISION}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital TV, and more particularly, to a digital TV which enables to store and reproduce digital broadcasting programs and additional information using existing VRs.

1 is a schematic internal configuration diagram of a general digital TV, and a tuner 1 for tuning a signal of one channel in a signal received through an antenna as shown therein; A demodulator (2) for demodulating the tuned signal; A channel decoder (3) for sorting the demodulated signal for each data stream; A demux unit 4 for classifying the sorted data streams and outputting the sorted data streams to each processor; An audio decoder 5 for decoding an audio signal of the demux signal and outputting the decoded audio signal to a speaker 6; A video decoder (7) for decoding a video signal of the demux signal; An additional information processor (10) for decoding the additional information signal among the demux signals; And a signal synthesizer 8 for synthesizing the decoded video signal and the side information signal and outputting the synthesized video signal to the display unit 9.

Here, the demux unit 4 classifies the demodulated signal into audio, video, and additional information data (channel information, PSIP information, ATVEF information, etc.) streams and outputs them to the respective processing units.

The signal synthesizing unit 8 synthesizes the video signal decoded by the video decoder unit 7 and the additional information output from the sub information processing unit 10 to output the synthesized information.

At this time, the content of the additional information may or may not be output by the user's selection while watching the broadcast.

However, the digital TV is only a device capable of displaying received channel information and additional information on broadcasting, and a specific standard for storing the information has not yet been determined.

Therefore, many VR manufacturers are researching a method of storing using various recording media, but there is a problem that users cannot easily use it for various reasons.

For example, the conventional VRC is provided with a device for directly receiving and demodulating a tuner unit and a broadcast signal, except for the display unit.

Accordingly, the VRC may store the broadcast signal regardless of the TV on / off, and also output the TV signal through the TV to play the TV, thereby reproducing the stored broadcast through the TV, or presently Incoming video can be displayed on TV immediately.

However, in the case of connecting the VTV and the digital TV in the above manner, there is a problem in that the price is expensive because the tuner and all other devices embedded in the VCA need to be newly designed to meet the digital broadcasting standard.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and does not directly receive digital broadcasts from VRC, but connects to receive signals separated into respective data streams through TV, thereby receiving digital broadcast reception. It is an object of the present invention to provide a digital broadcast signal recording and reproducing apparatus capable of storing and reproducing information received by a digital TV without having a separate device.

1 is a schematic internal configuration diagram of a typical digital TV.

Figure 2 is a schematic diagram showing the internal configuration of the digital TV according to the present invention.

*** Description of the symbols for the main parts of the drawings ***

100: VR interface unit SW1 to SW3: switching unit

100a: signal output unit 100b: signal input unit

The present invention for achieving the above object is characterized in that it is possible to output and store the signals classified into each data stream through the digital TV, without adding a tuner unit for receiving the broadcast to V-Cal.

In addition, the present invention is characterized by recording a digital signal using an analog recording method.

In addition, the present invention is characterized in that it is possible to record a digital signal by using an analog VRC.

In addition, the present invention is characterized by having a TV mode and V-Cal mode, and displays a broadcast signal or a signal output from the V-Cal received directly according to the mode.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 is a schematic diagram showing an internal configuration of a digital TV according to the present invention, comprising: a tuner 1 for tuning a signal of one channel in a signal received through an antenna; A demodulator (2) for demodulating the tuned signal; A channel decoder (3) for sorting the demodulated signal for each data stream; A demux unit 4 for classifying the sorted data streams and outputting the sorted data streams to each processor; An audio decoder 5 for decoding an audio signal of the demux signal and outputting the decoded audio signal to a speaker 6; A video decoder (7) for decoding a video signal of the demux signal; An additional information processor (10) for decoding the additional information signal among the demux signals; A digital TV comprising a signal synthesizer 8 for synthesizing the decoded video signal and an additional information signal to a display unit 9, wherein each decoded data stream is output as a BC or output from a BC. And a V-C interface unit 100 for receiving a reproduction signal to be output to each data output device.

Here, the VR interface unit 100 may output a signal output from the decoder unit of each data stream in the TV mode to the output devices 6 and 9, and output the VSR in the BC mode. A switching unit (SW1 to SW3) for switching to receive the reproduction signal to be output to each of the data output devices (6, 9); A signal output unit (100a) for outputting the signals output from the decoders (5, 7, 10) of the respective data streams as V-Cal; And a signal input unit 100b for receiving a reproduction signal output from the VR.

In this case, the TV mode and the BC mode are switched by the user's selection. For example, the TV mode and the other channel are conventionally switched to the specific channel CH4 to display the VCA playback signal. TV mode.

In addition, the TV of the present invention is provided with an antenna terminal (not shown), a terminal (not shown) for outputting a signal to V-al, and a terminal (not shown) for receiving a signal output from the V-al.

Of course, the V-Cal connects an antenna terminal (not shown) to the output terminal of the TV using a terminal added as it is, and a signal output terminal to the input terminal of the TV.

Meanwhile, in the above embodiment, the VRC interface unit 100 is configured to input / output the decoded data stream, but may be configured to input / output the data stream before being decoded, and stored in the above manner. It is obvious that the tape must be connected to a digital TV configured in the same manner so that it can be played.

As described above, the digital TV of the present invention has an effect of storing and reproducing a program and additional information of a digital broadcast by using a conventional VRC.

In addition, the present invention has the effect of maximizing the amount of data that can be stored on one tape by storing the digital signal of the compressed form on the V-Cal tape.

Claims (5)

A tuner for tuning a signal of one channel in the signal received through the antenna; A demodulator for demodulating the tuned signal; A channel decoder for sorting the demodulated signal for each data stream; A demux unit for classifying the sorted data streams and outputting the sorted data streams to each processor; An audio decoder for decoding an audio signal among the demux signals and outputting the decoded audio signal to a speaker; A video decoder to decode a video signal among the demux signals; An additional information processor for decoding the additional information signal among the demux signals; A digital TV comprising a signal synthesizer for synthesizing the decoded video signal and an additional information signal and outputting the decoded video signal to a display, wherein each decoded data stream is output as a BC or a reproduction signal output from a BC is received. Digital TV, characterized in that it comprises a V-CAL interface unit to be output to the data output device. The method of claim 1, wherein the VR interface unit is to output the signal output from the decoder unit of each data stream in the TV mode to the output device (speaker, display unit), and in the BC mode in A switching unit (SW1 to SW3) for receiving a reproduction signal to be output so as to be outputted to each data output device (speaker, display unit); A signal output unit for outputting a signal output from the decoder unit of each of the data streams (audio, video, additional information) as a BC-Al; Digital TV, characterized in that configured as a signal input unit for receiving a reproduction signal output from the V-Cal. The digital TV according to claim 1, wherein the VR interface unit is configured to input / output a data stream before decoding. 3. The digital TV according to claim 2, wherein the VR mode is switched to a specific channel (CH4) for displaying a VR playback signal. The digital TV according to claim 2, wherein the TV mode switches to a channel for directly displaying a broadcast signal currently received.