KR100628188B1 - apparatus for receiving high definition of ground wave/cable composite - Google Patents

Abstract

An object of the present invention is to update the terrestrial EPG for other channels in parallel while watching the terrestrial broadcast, so that the viewer can watch the terrestrial broadcast in a short time when the terrestrial receiver is turned on and update the EPG content that changes frequently from time to time. The present invention provides a terrestrial cable composite HD receiver capable of recovering a bit stream of a terrestrial and a cable broadcast signal, respectively, and a bit stream recovery unit for terrestrial and cable broadcasting, and a bit stream of a received terrestrial broadcast signal. A terrestrial broadcast dedicated bit stream restoration unit, a switching unit for selecting outputs of the terrestrial and cable broadcasting bit stream restoring unit and the terrestrial broadcasting dedicated bit stream restoring unit to be connected to the rear stage, and the terrestrial and cable broadcasting bit stream restoring unit The terrestrial broadcast For restoring the bit stream of the selected broadcast program and the additional information in the tuning channel output through the switching unit, the CPU controlling the bit stream recovery unit and the switching unit, the memory for storing the EPG database construction data, and the data output through the switching unit. It is characterized by comprising a picture and sound recovery unit.

Terrestrial broadcast, EPG, HD receivers.

Description

Terrestrial / cable composite HD receiver Apparatus for receiving high definition of ground wave / cable composite

1 is a block diagram showing a conventional terrestrial broadcast receiver;

Figure 2 is a block diagram showing a terrestrial / cable complex HD receiver according to the present invention.

Description of the main symbols in the drawings

11,22,28 Tuner 12,25,29 VSB Demodulator

13,26,30: Transport Demux 14,33: MPEG (HD) Decoder

15,34: AC-3 decoder 16,67: memory

17,36: CPU

20: data bit stream recovery unit for both terrestrial and cable broadcasting

21: first switch 23: second switch

27: data bit stream recovery unit dedicated to terrestrial broadcasting

32: image and sound recovery unit 35: switching unit

The present invention relates to a HD receiver, and more particularly, to a terrestrial / cable composite HD receiver capable of updating terrestrial EPG (Electric Program Guide) for all terrestrial channels in parallel while watching terrestrial broadcasting. .

In the United States, terrestrial digital broadcasting is being conducted and many terrestrial receivers are sold.

As digital broadcasting begins, the number of channels that viewers can watch is increasing considerably, and unlike analog broadcasting, a single physical channel does not have only one broadcast but several programs can be transmitted simultaneously. In addition, since the composition of the program may change from time to time, the EPG function, which can show viewers a program guide in the future, is essential for digital broadcasting, and has become the most distinguishing factor from other broadcasts.

In order to compose the terrestrial broadcast EPG, each broadcaster uses the Program and System Information Protocol (PSIP) information that is provided for the EPG on their broadcast channel, using an event information table (EIT) and extended test (ETT) containing data for the actual EPG. Tables are interpreted to show viewers the EPG through an on-screen display (OSD).

1 is a block diagram schematically showing a conventional terrestrial HD receiver, a tuner 11 tuned to a channel frequency to select a channel, and a VSB demodulator for demodulating a sideband (VSB) to restore an original data bit stream. 12) and a video separated into a transport demux 13 and a transport demux 13 for separating and distributing a corresponding broadcast program or additional information from a bit stream output from the VSB demodulator 12 to a later stage. MPEG (HD) decoder 14 for decoding the data bit stream of the part and converting it into an image signal, AC-3 decoder 15 for decoding the data bit stream of the audio part and restoring it into a voice signal, and storing EPG data And a memory unit 16 for controlling the CPU 17 for controlling the performance of the EPG function.

In the conventional terrestrial HD receiver configured as described above, when a viewer turns on the terrestrial HD receiver, each terrestrial broadcast channel has only EIT and ETT information about its own channel, so that a terrestrial HD receiver can establish an EPG for the terrestrial channel. 12), through the loop of the TP demux 13, the main memory 16 and the CPU 17 to find and scan all terrestrial channels currently available to receive, to build the EIT and ETT database and store them in the memory 16 do.

The process of building EIT and ETT data by collecting EIT and ETT data while scanning the terrestrial channel is usually performed first when viewers turn on the receiver, and only updates the data of the switched channel whenever the viewer switches channels. When enabled, the broadcast picture is not shown while building the EIT and ETT databases.

Therefore, the conventional terrestrial HD receiver has a long time until the viewer first shows the broadcast screen when the viewer turns on the terrestrial HD receiver, which is very frustrating to the viewer, and updates the EPG content that changes frequently. There was a problem that can not be.

The present invention has been made in view of the problems of the prior art, and an object of the present invention is to update the terrestrial EPG for another channel in parallel while watching terrestrial broadcasting, thereby terminating the terrestrial wave within a short time when the viewer turns on the terrestrial receiver. It is to provide a terrestrial cable composite HD receiver that can watch a broadcast and can update EPG contents that change frequently at the same time.

Terrestrial / cable composite HD receiver according to the present invention for achieving the above object is a terrestrial broadcast dedicated data bit stream recovery unit for restoring the data bit stream of the received terrestrial broadcast signal, and the data of the received terrestrial and cable broadcast signal A terrestrial and cable broadcasting common data bit stream restoring unit for restoring a bit stream, a switching unit for selecting outputs of the terrestrial broadcasting dedicated data bit stream restoring unit and the terrestrial broadcasting and cable broadcasting data stream restoring unit and connecting to a rear end; An image and audio restoring unit for receiving the output of a switching unit and restoring the terrestrial and cable broadcasting programs into an image and a voice; With CPU, EPG Site is characterized by configured by comprising a memory for storing data for the base construction.

According to the terrestrial / cable composite HD receiver of the present invention, when a viewer tries to watch a terrestrial broadcast, the terrestrial and cable combined data bit stream restoring unit switches the terrestrial data bit stream to be restored and then turns on the terrestrial wave and cable. Either the combined data stream restoration unit or the terrestrial dedicated data stream restoration unit can perform the EPG function while watching the terrestrial wave, allowing the user to watch the selected broadcast program when the power is turned on at the same time. The base can be built and EPG content can be updated from time to time without interrupting terrestrial broadcasting.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram schematically showing a terrestrial / cable composite HD receiver according to the present invention.

The terrestrial / cable composite HD receiver of the present invention includes a terrestrial and cable broadcast data bit stream recovery unit 20 for restoring data bit streams of terrestrial and cable broadcast signals received, and a data bit stream of received terrestrial broadcast signals. A broadcast channel is selected using any one of the terrestrial broadcasting dedicated data bit stream recovery unit 27 for restoring the data, and after the data bit stream of the corresponding channel is restored, the broadcast program in the corresponding channel is used for the terrestrial and cable broadcasting common bit streams. A switching unit 35 which selects an output of the recovery unit 20 and the data bit stream recovery unit 27 dedicated to terrestrial broadcasting, and connects to the rear stage; and data bits of additional information such as a selected broadcast program and EPG in the selected channel. An image and sound recovery unit 32 for restoring a stream to image and sound; The data bit stream recovery unit 20 for cable broadcasting, the data bit stream recovery unit 21 for terrestrial broadcasting, and the CPU 36 controlling the switching unit 35 and a memory unit for storing data for EPG database construction. It consists of 37.

The terrestrial and cable broadcast data bit stream recovery unit 20 includes a first switch 21 for selecting and connecting a cable and a terrestrial antenna, a tuner 22 for selecting a channel for terrestrial broadcast or cable broadcast, and terrestrial broadcast or A second switch 22 connected to the rear end according to the broadcast mode for selecting the cable broadcast signal, a QAM demodulator 24 for restoring the data bit stream of the cable broadcast signal, and a data bit stream for the terrestrial broadcast signal. A VSB demodulator 25 and a transport demux 26 for selectively separating and connecting broadcast programs and additional information of audio and video in selected channels of terrestrial broadcast or cable broadcast signals.

The terrestrial broadcast dedicated data bit stream recovery unit 27 includes a tuner 28 for tuning the channel of the terrestrial broadcasting, a VSB demodulator 29 for restoring the data bit stream of the tuned channel, and a restored terrestrial broadcasting in the selected channel. And a transport demux 30 for selectively separating and connecting video and audio broadcasting programs and additional information of a signal.

The image and audio reconstructing unit 32 decodes and reproduces the audio and the MPEG (HD) decoder 33 which decodes and reproduces the image data in the data bit stream of the terrestrial or cable broadcasting signal output from the switching unit 35. It consists of an AC-3 decoder 34.

The operation of the terrestrial / cable composite HD receiver of the present invention configured as described above will be described.

When the viewer wants to listen to the cable broadcast, the first switch 21 and the second switch so that the tuner 22 of the terrestrial and cable broadcast data bit stream recovery unit 20 is connected to the cable terminal and the QAM demodulator 24, respectively. When the switch 23 is operated, the cable, the first switch 21, the tuner 22, the second switch 23, the QAM demodulator 24, the transport demux 26, and the switching unit 35 and the image And it can listen to the cable broadcast through the voice recovery unit 32.

On the other hand, when the viewer listens to the terrestrial broadcast, the first switch 21 and the second switch 23 are operated so that the tuner 22 is connected to the terrestrial antenna and the VSB demodulator 25.

The viewer then uses the other data bit stream recovery unit while restoring the screen using either the data bit stream recovery unit 20 for terrestrial and cable broadcasting or the data bit stream recovery unit 27 for exclusive use of terrestrial broadcasting. Build an EPG database.

That is, assuming that the terrestrial and cable broadcasting data bit stream restoration unit 20 is used to construct an EPG database, and the terrestrial broadcasting data bit stream restoration unit 27 is used to restore the screen, the viewer switches the power supply. If a channel is selected, each channel is selected through the tuner 22 of the terrestrial wave and cable broadcasting data bit stream recovery unit 20, and then the data bit stream of the additional program information such as broadcast program data and EPG of each channel is connected to the VSB demodulator 25. After restoration through the transport demux 26, only the EPG of each channel is separated and stored in the memory unit 37. When the EPG function is performed for all channels, the data is updated while going back to the first channel and scanning. If so, repeat the action to keep updating the EPG database.

In the database thus constructed, the information of the EPG is displayed on the screen through the switching unit 35 and the image and audio restoration unit 30 under the control of the CPU 36.

At the same time, the terrestrial broadcast dedicated data bit stream recovery unit 27 selects a channel from its tuner 28 and then restores the data bit stream of various broadcast program data of the selected channel through the VSB demodulator 29, and then, One broadcast program in the channel selected through the MUX 30 is separated and then input to the image and audio reconstruction unit 32 through the switching unit 35, and the MPEG (HD) of the image and audio reconstruction unit 32 is provided. The decoder 33 and the AC-3 decoder 34 restore the image and sound and display them on the display device (monitor) of the next stage.

As described above, according to the terrestrial / cable composite HD receiver according to the present invention, by adding only a little hardware (HW) such as a data bit stream recovery unit and a memory dedicated to the terrestrial broadcast signal to an existing terrestrial / cable composite HD receiver, Can watch the screen without having to wait for the first time, and can update the terrestrial EPG contents, which are constantly changing without interrupting the viewing of terrestrial broadcasting, thereby providing a valid EPG to viewers at all times.

Claims (4)

A terrestrial and cable broadcast data bit stream recovery unit for restoring a data bit stream of the received terrestrial and cable broadcast signals, respectively; A terrestrial broadcast dedicated data bit stream recovery unit for restoring a data bit stream of the received terrestrial broadcast signal; A switching unit for selecting an output of the data bit stream recovery unit for the terrestrial and cable broadcasting and the data bit stream recovery unit for the terrestrial broadcasting; A CPU controlling the terrestrial broadcasting dedicated data bit stream recovery unit and a switching unit; A memory that stores data for building an EPG database; And And a picture and sound reconstruction unit for reconstructing the data bit stream of the selected broadcast program and the additional information in the selected channel output through the switching unit into a picture and a voice. The method according to claim 1, The data bit stream recovery unit for terrestrial and cable broadcasting, A first switch to switch between terrestrial broadcasting and cable broadcasting; A tuner for selecting a channel of the selected terrestrial or cable broadcasting; A first demodulator for recovering a data bit stream of the selected cable broadcast channel; A second demodulator for restoring a data bit stream of the selected terrestrial broadcast channel; A second switch for selecting and connecting any one of the first demodulator and the second demodulator; And a transport demux for separating and outputting a selected broadcast program or additional information in a channel output from the first and second demodulators. The method according to claim 1, The terrestrial broadcast dedicated data bit stream recovery unit, A tuner for selecting and outputting a channel of terrestrial broadcasting; A third demodulator for restoring a data bit stream of a selected channel output from the tuner; Transport demux terrestrial / cable composite HD receiver device comprising the outputs from the third demodulator is output by separating the broadcast program and the additional information in the data bit stream. A QAM demodulator for restoring a data bit stream of the received cable broadcast signal; A VSB demodulator for restoring a data bit stream of the received terrestrial broadcast signal; A switching unit for switching the output of the QAM demodulator and the output of the VSB demodulator; A CPU controlling the switching unit to switch any one of the QAM demodulator and a VSB demodulator; An MPEG decoder which decodes and reproduces the image data of any one of the data bit stream of the cable broadcast signal and the data bit stream of the terrestrial broadcast signal, which is output through the switching unit; And And an AC-3 decoder for decoding and reproducing voice data of one bit stream of the data bit stream of the cable broadcast signal and the data bit stream of the terrestrial broadcast signal output through the switching unit. HD receiver.

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