KR100357095B1 - method and apparatus for transmitting program information in digital interface - Google Patents

Abstract

The transmitter transmits the program information selected by the user to the receiver, converts and stores the program information or MPEG2-TS selected by the user in the receiver, and then retransmits the MPEG2-TS according to the corresponding program information in the receiver during playback. The present invention provides a method and apparatus for transmitting program information of a digital interface for reproducing only a program selected by a user. Particularly, a program information selected by a user in a receiver is transmitted by transmitting program information selected by the user in a transmitter to a receiver. Alternatively, by converting and storing the MPEG2-TS, the receiver may retransmit the MPEG2-TS according to the corresponding program information to reproduce only the program selected by the user.

Description

Method and apparatus for transmitting program information in digital interface

The present invention relates to a digital interface, and more particularly, to a method and apparatus for transmitting program information of a digital interface.

In the existing analog A / V device, there was no way to control another device from one device, but as most A / V devices gradually became digital, they made it possible.

For example, the HD-DVCR conference (High Definition-Digital Video Cassette Recorder Conference) defines a command set called AV / C CTS (Audio / Video control Command and Transaction Set) to control a device (also called a remote controller). Local devices), which allow operation commands to be sent over the IEEE 1394 serial bus.

Here, the IEEE 1394 serial bus is a standard for high-speed data transmission defined by the IEEE, and is used as an interface for interconnecting devices of a digital multimedia system, and isochronous transfer mode. And Asynchronous transfer mode, A / V data is transmitted in real time using isochronous transfer mode, and transactions such as Read / Write / Rock required for communication use Assurance transfer mode. It is sent asynchronously.

Control commands such as the AV / C CTS are transmitted asynchronously using this acknowledgment transmission mode.

Meanwhile, the Specifications of Consumer-Use Digital VCRs using 6.3mm magnetic tapes-PART 8: ATV Specifications of Consumer-Use Digital VCRs and Specifications of Digital Interface for Consumer ElectronicAudio / Video Equipment-PART 1, PART 4 Looking at it, HDVCR, which uses 6.3mm magnetic tape as a recording medium, can record ATV broadcasts in the form of Moving Picture Experts Group2-Transport Stream (MPEG2-TS) transmitted using IEEE 1394.

In particular, in the above document, MPEG2-TS uses the isochronous transmission mode of IEEE 1394 in one common format, that is, a common isochronous packet (CIP) header structure as in the case of DVC (Digital Video Cassette). In this case, AV / C CTS is adopted as the control command.

Here, MPEG2 is represented by three standards of MPEG2-system, MPEG2-Video, and MPEG2-Audio. Among them, transport streams (TS) and program streams (PS) are defined as transport standards defined in the MPEG2-system.

In addition, one program is composed of video information, audio information, and user data information, and MPEG2-TS defined in the MPEG2 system layer is a time-division of video, audio, and user data information corresponding to multiple programs in one stream. Is multiplexed.

The MPEG2-TS includes program specific information (PSI) to properly analyze audio, video, and user data information corresponding to a desired program when demultiplexing at a receiving side.

Most of the PSI is in a table format. Representative tables include PAT (Program Allocation Table), PMT (Program Map Table), CAT (Conditional AccessTable), and the most important tables are PAT and PMT. There is one, and it is a table that summarizes the PID (Packet IDentification) for each transport stream packet containing a video stream and an audio stream of the program.

That is, the video stream of the program is represented by PID = XXXX and the audio stream is represented by PID = YYYY.

The packet of the transport stream has a fixed length of 188 bytes, and since a plurality of programs generally exist in one transport stream TS, there are a plurality of PMTs in the transport stream.

Therefore, there is a need for a comprehensive table that connects multiple programs being transmitted in a transport stream with PIDs for PMTs for each program. This table is called PAT.

Since one program is represented by one program number, most items of the PAT are composed of information representing the relationship between program number = XXXX and PMT PID.

Hereinafter, a transport stream delivery apparatus and method of a digital interface according to the prior art will be described with reference to the accompanying drawings.

1A and 1B illustrate the syntax and structure of a PAT used in a conventional IEEE 1394 serial bus.

The transport stream delivery apparatus and method of a digital interface according to the prior art will be described in detail with reference to the accompanying drawings.

In MPEG2-TS used in current broadcasting, PAT information, as shown in FIG. 1, must be used to decode a stream, and MPEG-2 TS is stored between devices using a digital interface such as IEEE 1394. When playing again, the PAT information must be exchanged.

There are three types of conventional methods for delivering such PAT information.

First, when all the PAT information of the source data (Source data) is delivered, second, the method of delivering the program number of the currently delivered program using the command set (Command Set) of IEEE 1394 and third, PAT information This is a method of modifying and delivering the PAT information itself at the source side for transmitting the PAT information.

However, when all of the PAT information included in the original source data is transmitted, all of the PAT information embedded in the original source is transmitted without modification.

In this case, when the multi_program is delivered, if the user wants to record only the stream currently being watched or to record only a specific program, the user may select which program of the multi-program to play when recording and playing again. Since there is no way to know, when playing again, the playback device may malfunction due to the presence of multiple programs.

Therefore, the present invention has been made to solve the above problems, and after transmitting the program information selected by the user in the transmitter to the receiver to convert the program information or MPEG2-TS selected by the user in the receiver and then store It is an object of the present invention to provide a method and apparatus for transmitting program information of a digital interface for replaying MPEG2-TS according to corresponding program information in a receiver to reproduce only a program selected by a user.

1A and 1B illustrate the syntax and structure of a PAT used in a conventional IEEE 1394 serial bus.

2 is a diagram illustrating an embodiment of a block configuration to which a method for transmitting program information of a digital interface according to the present invention is applied;

Explanation of symbols for main parts of the drawings

10: transmitter 11: TP demux

12: A / V Decoder 13: A / V Digital / Analog Converter

14 host processor 15 first IEEE 1394 interface unit

20 receiver 21 second IEEE 1394 interface unit

22: PAT and stream conversion unit 23: PAT and stream storage unit

A feature of the method for transmitting program information of a digital interface according to the present invention for achieving the above object is that the data stream of one or multiple programs included in a channel selected by a user in a transmitter is digitally transmitted to a receiver together with an additional information table. A transport stream delivery method of a digital interface for recording and playing by interfacing, comprising the steps of: (a) a user selecting one program information of one or multiple programs included in the channel; and (b) the selected program information. And transmitting one or multiple program data streams from the transmitter to the receiver through a digital interface, and (c) one or multiple programs transmitted from the receiver according to program information transmitted through the digital interface. The data stream of And changing the information table and storing the information table together with the data stream of one or multiple programs. Step (c) includes one of the additional information tables based only on the contents related to the program information transmitted through the digital interface. The PAT value may be changed and stored. In step (c), the data stream corresponding to the program information indicated by the changed and stored additional information table is found in the stored one or multiple program data streams during playback. And transmitting to the transmitting device via the digital interface and reproducing. The apparatus for transmitting program information of the digital interface according to the present invention includes one or multiple programs included in a channel selected by a user in the transmitting device. Data stream In the transmission stream transmission apparatus of the bumper interface for digitally recording and reproducing the rim to the receiving device, the transmitting device demuxes only a program selected by a user among one or multiple programs to be transmitted or reproduced, and then displays it through decoding. A demux and decoding unit for transmitting the program information corresponding to the selected program and a data stream of the one or multi programs to the receiving device when the user selects one of the one or multi programs for reproduction; And a first digital interface unit for outputting a data stream of a program input from a receiving device to the demux and decoding unit for reproduction, and a control unit for controlling the demux, decoding and transmission, and the receiving device comprises: Digital interface According to the second digital interface unit for receiving the program information and the data stream of one or multi-program or transmitted to the transmitting device, and the program information input through the second digital interface unit And a PAT and stream converting unit for changing a PAT value in a data stream of one or multiple programs transmitted, and a PAT and stream storage unit for storing one or multi program data streams transmitted together with the changed PAT. The PAT and the stream converting unit searches for the data stream corresponding to the program information indicated by the changed and stored PAT when the playback is selected by the user in the stored data stream of one or multiple programs, and then the second digital together with the changed PAT. Interfe Switch is characterized in that the output portion.

The present invention transmits the program information selected by the user in the transmitter to the receiver to convert and store the program information or MPEG2-TS selected by the user in the receiver to play the MPEG2-TS according to the corresponding program information in the receiver during playback. Retransmission can play only the program selected by the user.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, a preferred embodiment of a method for transmitting program information of a digital interface according to the present invention will be described with reference to the accompanying drawings.

2 is a view showing an embodiment of a block configuration to which the method and apparatus for transmitting program information of a digital interface according to the present invention are applied, and includes a transmitter 10 such as a DTV or an STB, and a receiver such as a DVCR or a DVDR. 20).

The transmitter 10 has a TP demux 11 for demuxing a multi-program or playing a multi-program from an input stream MPEG2-TS, and A / V for decoding A / V from the de-muxed program. A V decoder 12, an A / V digital-to-analog converter 13 for converting the decoded A / V into analog A / V and outputting the program, and a program selected by the user as a whole to control the operation of the entire circuit. The host processor 14 outputting a control signal corresponding to the number, the program number selected by the user according to the control signal of the host processor 14, and the MPEG2-TS output from the TP demux 11 are respectively IEEE. A first IEEE 1394 interface unit 15 converts and outputs the reproduced program from an interface of an IEEE 1394 format converted to or interfaced to a 1394 format.

The receiver 20 extracts, outputs or reproduces a program number selected by a user and MPEG2-TS from an IEEE 1394 format signal transmitted from the first IEEE 1394 interface unit 15 in the transmitter 10. Second IEEE 1394 interface 21 for converting and interfacing to a signal in IEEE 1394 format, and a PAT for converting and outputting PAT and MPEG2-TS of MPEG2-TS outputted from the second IEEE 1394 interface 21; And a PAT and stream storage for recording the program corresponding to the number selected by the user among the recorded or converted MPEG2-TS in the stream converter 22 and the PAT and stream converter 22; It consists of a part 23.

A method of transmitting program information of a digital interface according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, when a user selects a predetermined channel to watch a broadcast program, the host processor 14 in the transmitter 10 controls a tuner (not shown) to tune the selected channel.

The tuned channel is then demuxed to the multi-program in TP demux 11 according to the control signal of the host processor 14.

Accordingly, the host processor 14 controls to display the demuxed multi-program so that a user can view it through a display device (not shown).

Thereafter, when the user selects a program number to be viewed among the displayed multi-programs, the host processor 14 controls the TP demux 11 to control the demux of the program corresponding to the selected program number.

The A / V decoder 12 then decodes and outputs the A / V in the demuxed program according to the control signal of the host processor 14.

The A / V digital-to-analog converter 13 then converts the decoded A / V into A / V analog and displays the program corresponding to the selected program number.

In this state, when the user selects the number of the corresponding program for storing the program being watched or another program, the host processor 14 sets the TP demux 11 to demux the multi-program included in the channel. do.

In this case, the TP demux 11 demuxes the MPEG2-TS of the multi-program to the first IEEE 1394 interface unit 15 if the program is being viewed according to the setting of the host processor 14.

In addition, the host processor 14 outputs a control signal for storing the selected program number.

Then, the first IEEE 1394 interface unit 16 transmits the control signal output from the host processor 14 to an Asynchronous data packet of the IEEE 1394 format and demuxed by the TP demux 11. Alternatively, the MPEG2-TS of the multi-program is loaded on an isochronous data packet and interfaced to the receiver 20.

Accordingly, the second IEEE 1394 interface 21 in the receiver 20 receives a control signal from an acknowledgment data packet of the IEEE 1394 format interfaced by the first IEEE 1394 interface 15 in the transmitter 10. One or multiple programs of MPEG2-TS are extracted from the isochronous data packet and output.

The PAT and stream converter 22 then converts and outputs the PAT or MPEG2-TS of the corresponding program in MPEG2-TS of the one or multi programs according to the control signal output from the second IEEE 1394 interface 21. .

That is, the PAT and stream converter 22 records the program number to be stored according to the control signal in a predetermined area of the PAT in MPEG2-TS of one or multi programs and then outputs one or multiple programs.

In addition, the PAT and stream converter 22 records a program number to be stored by inserting a predetermined area into the MPEG2-TS of the one or multi programs, and then outputs the MPEG2-TS.

Accordingly, the PAT and stream storage section 23 stores the MPEG2-TS of one or multiple programs output from the PAT and stream conversion section 22, or stores the MPEG2-TS in which the program number is recorded.

Then, when the user tries to play the program stored in the receiver 20, the host processor 14 outputs a control signal for playing the program corresponding to the program number, and demuxes the number of the program. Set the demux 11.

Then, the first IEEE 1394 interface unit 15 converts the program reproduction control signal of the host processor 14 into an Asynchronous data packet and then interfaces with the receiver 20.

Accordingly, the second IEEE 1394 interface 21 in the receiver 20 controls the program reproduction from the Asynchronous data packet interfaced by the first IEEE 1394 interface 15 of the transmitter 10. Extract the signal and output it.

Then, the PAT and stream converter 22 draws and outputs the MPEG2-TS corresponding to the program number to be reproduced by the user from the PAT and stream storage unit 23 according to the program reproduction control signal.

Accordingly, the second IEEE 1394 interface unit 21 converts the program output from the PAT and stream converter unit 22 into the IEEE 1394 format, and then the receiver 10 through an isochronous data packet. Interface).

Then, the first IEEE 1394 interface unit 15 of the receiver 10 draws a program to be reproduced by the user from an isochronous data packet interfaced by the second IEEE 1394 interface unit 21. Output to TP demux 11.

Then, the TP demux 11 demuxes and outputs the program output from the first IEEE 1394 interface unit 15 according to the setting of the host processor 14.

The A / V decoder 12 then decodes and outputs the A / V from the program demuxed by the TP demux 11.

Then, the A / V digital-to-analog converter 13 converts the A / V decoded by the A / V decoder 12 into A / V analog and displays it on the display device.

As described above, the method and apparatus for transmitting program information of a digital interface according to the present invention transmits program information selected by a user in a transmitter to a receiver to convert program information or MPEG2-TS selected by a user in a receiver. By storing the data, the receiver retransmits the MPEG2-TS according to the corresponding program information to reproduce only the program selected by the user.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (8)

In the transport stream delivery method of the digital interface for recording and playing back the data stream of one or multi programs included in the channel selected by the user at the transmitter with the additional information table to the receiver, (a) a user selecting program information of any one or multiple programs included in the channel; (b) transmitting the selected program information and one or multiple program data streams from the transmitter to the receiver via a digital interface; (c) modifying the additional information table in the data stream of one or multiple programs transmitted from the receiver according to the program information transmitted through the digital interface and storing the information table together with the data stream of one or multiple programs. Program information transmission method of the digital interface, characterized in that. delete The method of claim 1, Step (b) is a method for transmitting program information of a digital interface, characterized in that for transmitting the selected program information as an acronym data packet of the IEEE 1394 format, the data stream of the one or multi program as an isochronous data packet. The method of claim 1, The step (c) of the program information transmission method of the digital interface, characterized in that for changing only the content associated with the program information transmitted through the digital interface PAT value of one of the additional information table. The method of claim 1, wherein step (c) And reproducing the data stream corresponding to the program information indicated by the changed and stored additional information table in the stored one or multi program data streams and transmitting the data stream to the transmitting device through the digital interface for reproduction. Program information transmission method of the digital interface. The method of claim 5, The changed additional information table is also transmitted to the transmitting device through the digital interface. In the transport stream transmission apparatus of a collision interface for digitally recording and reproducing the data stream of one or multiple programs included in the channel selected by the user in the transmitting device to the receiving device, The transmitting device A demux and decoding unit for demuxing only the program selected by the user among the one or multi programs to be transmitted or reproduced, and displaying the result through decoding; and when the user selects one of the one or multi programs for reproduction, A first digital interface unit for transmitting program information corresponding to a program and data streams of the one or multi programs to the receiving device or outputting the data stream of the program input from the receiving device to the demux and decoding unit for reproduction; A control unit for controlling the demux and decoding and transmission; The receiving device A second digital interface unit configured to receive program information and one or multiple program data streams transmitted through the first digital interface or to transmit a data stream of a program to be reproduced to the transmitting device; and through the second digital interface unit. A PAT and stream converting unit for changing a PAT value in a data stream of one or multiple programs transmitted according to input program information, and a PAT and stream storage unit for storing one or multi program data streams transmitted together with the changed PAT. Program information transmission device of the digital interface, characterized in that configured. The method of claim 7, wherein the PAT and stream conversion unit When playback is selected by the user, the data stream corresponding to the program information indicated by the changed and stored PAT is found in the stored data stream of one or multiple programs, and then output to the second digital interface unit together with the changed PAT. Program information transmission device of the digital interface.