KR20000034698A - Device and method for transmitting navigation data of a recording media - Google Patents

Abstract

PURPOSE: A device and method for transmitting navigation data of a recording media is provided so that a user can make change easily program reproducing operations and program titles by separating navigation data being included as Unpackete and Packete from digital data stream reading out from the recording media, converting the separated navigation data into PES or Private section format of MPEG standard when transmitting digital navigation data stream of MPEG type and transmitting the converted data by using IEEE 1394 interface. CONSTITUTION: A device and method for transmitting navigation data of a recording media includes several steps. A first step separates navigation data stream being read out from the recoding media. A second step converts the separated navigation data stream into PES data format stream. A third step transmits the converted stream format as a predetermined format.

Description

Navigation data transmission apparatus and method of a recording medium

The present invention relates to a navigation data transmission apparatus and method of a recording medium, and more particularly, digital data read from the recording medium when transmitting MPEG navigation (MPEG) type digital navigation data stream using an IEEE 1394 interface. Navigation data of a recording medium that separates the navigation data contained in a packet into an unpackete and a packet, and converts and converts each of the navigation data into a MPEG standard in a PES format or a private section format. The present invention relates to a transmission apparatus and a method.

Recently, standardization of DVD media (DVD: Digital Versatile Disc or Digital Video Disc, hereinafter referred to as DVD) has been rapidly performed among related companies, and it is expected that the spread of DVD will be widely spread in the future. A digital video display device capable of displaying a high-definition image, for example, a digital satellite broadcasting or a digital television (D-TV, hereinafter referred to as D-TV) that displays digital high-definition images of the DVD more clearly. It is expected to spread widely.

Accordingly, the use of the DVD player (or DVD recorder / player) for playing the DVD and the D-TV is expected to increase rapidly, and the communication standard of IEEE 1394 is required for data transmission between the devices. Employment is confirmed.

On the other hand, the DVD player processes the MPEG data digital data stream, in particular, the program stream (Program Stream, hereinafter referred to as PS) into presentation (PT) data and navigation data (Navigation, NV). The presentation data PT is output as a video / audio signal, and the navigation data NV is used to control the playback operation of the DVD player.

However, unlike the DVD player, the D-TV processes video / audio signals by processing MPEG data digital data streams, in particular, a transport stream (TS), as presentation data. Since the DVD player converts the PS into a TS and transmits the signal, or the D-TV converts the input PS into a TS and processes the signal.

Therefore, as an example of a device for converting a format of a digital data stream as described above, a configuration and an operation of a conventional PS / TS converter for converting a PS into a TS and a DVD player and a D-TV according to the present invention will be described with reference to the accompanying drawings. The explanation is as follows.

FIG. 1 is a block diagram of a general optical disc apparatus and a video display apparatus for transmitting and receiving data using the IEEE 1394 interface, and a DVD player and a D-TV are shown as an example.

1 shows an optical disc (DVD) 1, an optical pickup (P / U) 2 for reading recording data from the optical disc, and a demodulation section 3 for demodulating and error-correcting the read data. A scrambler (Scrambler or CSS) for adding a copy protection code to the output data of the demodulator, and a selection output unit 5 for selecting an output path of the data to which the copy protection code is added; The data stream input from the selective output unit, that is, the program stream, is divided into presentation data (PT: Presentation), and navigation data (NV: Navigation, hereinafter NV). Data parser 6 for separating / outputting PT data into audio, video and sub picture data, and respective decoders 7 for decoding the separated audio, video and sub picture data. 8,9) and the decoded audio , A presentation engine (10) for outputting a digital audio signal and a video signal by combining video and sub-picture data, and a D / A converter for converting and outputting the digital audio and video signals into analog video and audio signals, respectively. (11, 12) and the navigation manager for controlling the reading operation of the optical disk to receive the NV data divided and outputted separately from the data separator (Parser) 6 to perform the operation corresponding to the user's key input (Navigation) Manager 13, the PS / TS converter 14 for converting the output data output from the selective output unit 5, that is, the program stream PS into a transport stream TS, and the converted transport. A DVD player S1 comprising an IEEE 1394 interface unit 15 for transmitting a stream TS;

Demuxing the IEEE 1394 interface unit 21 that receives the data stream transmitted from the DVD player S1, that is, the transport stream TS, and the transport stream TS received from the interface unit 21. Demux 23 for separating and outputting audio and video data, and decoders 24 and 25 for decoding and outputting the separated and output audio and video data, respectively, as digital audio signals and video signals. ), D / A converters 26 and 27 for converting / outputting the digital audio and video signals into analog audio and video signals, and a user interface controller for outputting a control signal in response to a user's key input. D-TV (S2) comprising a 22,

It is shown that the user key input means 100 for controlling the operation of the DVD player (S1) and the D-TV (S2).

2 is a detailed configuration diagram of a conventional PS / TS converter. Each data packet constituting the PS by receiving the output data of the selective output unit 5, that is, the program stream PS, is described above. The header of the packet is decoded, the ID of the data stream included in the packet header is detected, and the navigation data NV, the presentation data PT, and the data stream are included in the program stream PS. Demuxing of the packet header decoder 41 for separating and outputting system clock data and for each component data of the separated presentation data PT, that is, audio and video (including sub-picture) data, respectively. Demux 42 to separate / output and buffer audio and video data separated / output from Demux 42, and read out at a speed faster than the input speed. (Buffer) (43,44) and the packet header The interpreter 47 which interprets the system clock data separated and output from the decoder 41 and the interpreted system clock are compared with a reference system clock (STC: System Time Clock). Program specification information (PSI: Program Specific Information) is received by receiving a timing controller 49 for controlling data read timing and data transfer timing of (43, 44) and navigation data (NV) output separately from the packet header decoder (41). The additional information generating unit 46 which adds and outputs an information analysis and a cyclic redundancy check (CRC) code, and the additional information generating unit 46, buffers 43 and 44, and the timing controller 49 Controls the operation of the TS packetizer 45 and the buffers 43 and 44 and the timing controller 49 which packetize and output the program stream PS into the transport stream TS according to the output. And compensating control / compensation unit 48 And it shows the configured.

Prior to the description of the operation of the conventional PS / TS converter and the DVD player and the D-TV configured as described above, the format of the digital data stream, i.e., the program stream PS and the transport stream TS, of the MPEG method is described. Briefly explain the differences.

The program stream PS is a data stream composed of a plurality of packets in which audio data, video data, and additional information data, which are digital data, is one packet. The packet has a variable length. The size of the data stream can be changed according to the size of the data. Therefore, the size of each packet is not always the same. For example, if the size of the data packet is set to 2Kbyte, and the arbitrary data size exceeds the 2Kbyte, a part of the arbitrary data can be continuously inserted into the next subsequent packet, and the arbitrary data size can also be inserted. If less than 2Kbyte, a padding area may be created in the extra portion of the packet, and another arbitrary data may be inserted and used according to the size of 2Kbyte.

On the other hand, the transport stream TS has a fixed size of a data stream. For example, an audio packet 188 bytes, a video packet 188 bytes, and content can be determined. Twelve packets consisting of ten packets, one audio packet, and one additional information data packet are configured and used as a group.

Therefore, in order to convert the program stream PS into the transport stream TS, the size of the program stream PS packet is adjusted to the size of the transport stream TS packet, for example, 188 bytes, and is sequentially divided. It should be changed and configured on the time axis. At this time, various necessary headers are added and converted.

Hereinafter, operations of the conventional PS / TS converter and the DVD player and the D-TV according to the related art will be described. As shown in FIG. 1, a program stream PS that is first read and processed from an optical disc (DVD) is described above. The data is separated into audio, video, and sub-picture data by a parser 6, and the audio and video signals are transmitted by the decoders 7, 8, 9, the presentation engine 10, and the D / A converter. When the program stream PS is input to the PS / TS converter 14 by the selection output unit 5, the packet header decoder 41 is input as shown in FIG. The program stream PS is decoded to interpret the stream ID, and the program specification information PSI, which is information for controlling the navigation data NV included in the program stream PS, in particular, the program reproduction, audio and video Presentation data (PT) corresponding to the signal, Separates each separated by the system clock data (SCD).

The separated program specification information (PSI) is information for controlling program reproduction. The separated program specification information (PSI) is input to the additional information generation unit 46 and converted into data to which a CRC is added. The system clock data SCD is interpreted by an interpreter ( 47 is inputted to the system clock, and is then compared with the reference system clock STC by the timing controller 49 again. On the other hand, the presentation data PT is output as audio, video, and sub-picture data by the demux 42, and the sub-picture data is video data that is usually signal-processed into subtitle images or PIP images. The data is batch-processed with the data and applied to the video buffer 43 having a 2 Kbyte buffer capacity, and the audio data is applied to the audio buffer 44 having a 4 Kbyte buffer capacity. Audio and video (including sub-picture) data stored in the buffers 43 and 44 at an input rate of 10.08 Mbps, respectively, are output at a read speed of 19.28 Mbps or more, respectively, under the control of the control / compensation unit 49.

In this way, the output and generated data is converted into a transport stream TS by the packetizer 45, and the converted transport stream TS is converted into an IEEE 1394 interface unit 15, 16), to the D-TV S2.

The input transport stream TS is displayed as an audio and video signal through a demux 23, a decoder 24, 25, and a D / A converter 26, 27 configured in the D-TV S2. For example, the transport stream TS is transmitted in an isochronous data packet structure having isochronous property, and a user selection key selected from the D-TV S2, that is, navigation. Command is an asynchronous data packet structure having asynchronous, which is transmitted to the DVD player S1 so that the navigation manager 13 controls the navigation operation according to the user interface. .

However, the navigation data NV transmitted to the D-TV S2 in this way is navigation data included as a packet in the digital data stream read out from the recording medium, that is, program specification information (PSI) for controlling program reproduction. In order to change the program list (Title) and the like of the recording medium, the user must separately control the DVD player (S1).

Accordingly, the present invention was created to solve the above problems, and separates the navigation data contained in an unpackaged or packet into a digital data stream read from a recording medium, and separates the navigation data. It is an object of the present invention to provide a navigation data transmission apparatus and method for a recording medium for converting a PES format to a private section format and using an IEEE 1394 interface.

1 is a block diagram of an optical disk apparatus and a video display apparatus using a conventional IEEE1394 interface,

2 is a block diagram of a conventional program stream (PS) / transport stream (TS) converter,

3 is a block diagram of an optical disk apparatus and an image display apparatus to which a navigation data transmission apparatus and method of a recording medium according to the present invention are applied;

4 is a block diagram of a program stream (PS) / transport stream (TS) converter according to an embodiment of the present invention,

5 illustrates navigation transmission data according to the present invention;

6 shows a conversion process of a data stream according to the present invention,

7 illustrates a PES packet format according to the present invention,

8 illustrates a private section format according to the present invention.

※ Explanation of code for main part of drawing

80: data selector 81: packet header decoder (Decoder)

82: Demux 83,84,85: Buffer

86: additional information generating unit 87: TS packetizer (Packetizer)

88: Interpreter 89: control / compensator

90: timing controller

According to an aspect of the present invention, there is provided a navigation data transmission method of a recording medium, the navigation data transmission method of a recording medium comprising: separating navigation data read from the recording medium; Converting the separated navigation data into a stream of a PES data format; And transmitting the converted stream in a set transmission format.

In addition, the navigation data transmission method of the recording medium according to the present invention, the navigation data transmission method of the recording medium, comprising the steps of: separating the navigation data read from the recording medium; Converting the separated navigation data into a stream in a private section format including a table ID; And transmitting the converted data stream in a set transmission format.

In addition, the navigation data transmission method of the recording medium according to the present invention, the navigation data transmission method of the recording medium comprising the steps of: converting a recording medium data stream containing the navigation data into a stream of the PES data format; And adding the identification code for identifying the navigation data to the data stream converted into the PES data format and transmitting the data in a transmission format that is set.

In addition, the navigation data transmission apparatus of the recording medium according to the present invention, separating means for separating the non-packet and the navigation data contained in the packet in the data stream of the recording medium; Conversion means for converting the separated navigation data into a stream of a PES data format and transmitting the stream; And control means for controlling the conversion means so that the identification information of the converted and transmitted navigation data is added to the stream.

The apparatus and method for transmitting navigation data of a recording medium according to the present invention, which is performed as described above, separates navigation data contained as unpackets and packets into digital data streams read from the recording medium, respectively. A video display device in which the user receives the digital data stream by converting the separated navigation data into an MPEG standard, a PES format, or a private section format, and transmitting the converted navigation data through an IEEE 1394 interface. In this case, the program reproduction operation can be variably controlled using the navigation data, and the control operation for changing the program list of the recording medium can be facilitated.

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

As shown in FIG. 3, a program stream PS which is first read and processed from an optical disc (DVD) is separately outputted as audio, video and subpicture data by the data parser 56, The decoder 57, 58, 89, the presentation engine 60, and the D / A converters 61, 62 output audio and video signals, while the selection output unit 55 outputs the optical disc (DVD). The data stream read out from the input is input to the PS / TS converter 64. As shown in FIG. 4, the data stream is transmitted to the DVD 51 by a packet selector 80 as a packet. First navigation data for variably controlling (playing) a plurality of recorded program lists, that is, video management information (VMGI), and video list setting information (VTSI: Video). Title Setting Information, hereinafter referred to as 'VTSI') and Program Connection Information (PGCI: Progr) am Chain Information (hereinafter referred to as 'PGCI') and the program stream PS are separated and output. The first navigation data is data not packed in the program stream PS.

On the other hand, the packet header decoder 81 decodes the program stream PS outputted separately, interprets the stream ID, and controls the second navigation data NV included in the program stream PS, in particular, program reproduction. Program specification information (PSI), that is, data search information (DSI: Data Search Information (DSI)) and presentation control information (PCI). , The presentation data PT and the system clock data SCD corresponding to the audio and video signals are separated and output.

The separated program specification information (PSI), that is, the second navigation data, is information for controlling program reproduction, and is added together with first navigation data for variably controlling (reproducing) the plurality of program lists. The system clock data SCD is inputted to the information generating unit 86 and converted into data to which the CRC is added. The system clock data SCD is inputted to the interpreter 88 and outputted to the system clock. Compared to clock STC. Meanwhile, the presentation data PT is output as audio, video, and subpicture data by the demux 82, in particular, the subpicture data is video data which is typically signal-processed into subtitle images or PIP images. As an example, the video data is applied to a separate sub-picture buffer 83 having a buffer capacity of 4 Kbytes to be processed separately from the video data, and the video data is applied to a buffer 84 having a buffer capacity of 4 Kbytes. The audio / video and subpicture data applied to the audio buffer 8 having a buffer capacity of 4 Kbytes and stored at the input speeds of 10.08 Mbps in the buffers 83, 84 and 85, respectively, is controlled by the control / compensator 89 ), It is output at read speed of 19.28Mbps or more.

In this way, the output and generated data is converted into a transport stream TS by the packetizer 87, and the converted transport stream TS is converted into an IEEE 1394 interface unit 65, 66), to the D-TV S2.

The input transport stream TS is output as digital audio and video data through a demux 73, a decoder 74, 75, 76, and an overlapping unit 77 configured in the D-TV S2, The digital audio and video data are displayed as audio and video signals via D / A converters 78 and 79. On the other hand, as described above, the transport stream TS is transmitted in an isochronous data packet structure having isochronousness, and is selected by the user in the D-TV S2. The navigation command corresponding to the selection key is an asynchronous data packet structure having an asynchronous time, and is transmitted to the DVD player S1 so that the navigation manager 63 transmits the user interface to the user interface. Accordingly, the navigation operation, in particular, the program reproduction, as well as the program list (Title) is selected and variably controlled. On the other hand, when the rapid transmission of the navigation data is required, it may be transmitted in the isochronous data packet structure having the isochronous property.

As described above, the operation of converting the navigation data into the transport stream TS and transmitting the same will be described in detail with reference to the accompanying drawings.

First, FIG. 5 illustrates navigation transmission data according to the present invention. First navigation data included as unpacked in a digital data stream input to the data selection unit 80 as shown in FIG. And second navigation data included in a packet in the digital data stream.

As described above, the first navigation data includes VGMI (Video Manager Information), VTSI (Video Title Set Information), and PGCI (Program Chain Information) used for a program change control operation. (Informations) are divided into a plurality of detailed information as shown in (a) of FIG. 5, and selectively transmit or separate information corresponding to a control or an attribute among the separated detailed information. Send all the details.

On the other hand, the second navigation data is composed of Data Search Information (DSI) and Presentation Control Information (PCI), which are used to control a program reproduction operation. Since the DSI information is virtually used in a video display device, On the other hand, the PCI information, particularly highlight information (HLI) is necessarily transmitted because it is frequently used in a video display device. The highlight information (HLI) transmission is highlight information, that is, highlight data. All of them are transmitted or only the position data (coordinate information) and palette data of the highlight information HLI are selected and transmitted.

6 illustrates a process of converting a data stream according to the present invention, in which an elementary stream (ES) of navigation data is referred to as a packet element stream (PES). PES 'is converted into a PES packet of the format, and the converted PES packet is converted into a TP packet of the TP (Transport Protocol, TP) format again, the navigation data The element stream (ES) of is divided into a plurality of PES packets, in which the PES header is added, and the padding byte is filled by padding in the region where no data exists. .

In addition, the converted PES packet is converted into a TP packet of a plurality of TP formats. A TP header is similarly added to the divided TP packet, and an area (gray area) in which the padding byte is present is TP (TP). The header is filled with null data that has no meaning.

On the other hand, Figure 7 shows the format of the PES (PES) packet according to the present invention, the PES packet format is composed of a Packet Start Code Prefix and a Stream ID code, A packet start code for providing start information of a packet; PES packet length (PES Packet Length) for providing the length information of the PES packet; An optional PES header for providing copy related information such as Copy Protection; And a PES Packet Data area for providing navigation data, wherein the PES Packet Data area further comprises: a Stream ID for distinguishing navigation data; A total partition providing a total number of divided TP packets; A partition number providing each of the divided numbers; And configured and converted into a pure data area and transmitted.

Meanwhile, FIG. 8 illustrates a format for transmitting navigation data using a private section according to the present invention. The private section is defined and assigned in an MPEG so that a user can use it arbitrarily. Since the commonly used sections are rarely used, navigation data can be transmitted using the private section, and the private section format is a packet start code prefix. And a packet start code composed of a stream ID to inform the start of the packet; A table identifier (Table ID) indicating a type of transmission data, that is, navigation data is transmitted; A section syntax indicator that provides information on whether there is data in a private section length following the private section, that is, whether there is transmission data in the private section; Private Section Length indicating the data length of the Private Section; A Private Data Bytes area to which pure data is allocated, and when the data transmission is extended, a table identifier extension indicating that the transmission data is extended; A version number indicating a version of a private section by incrementing by 1 each time the value of the private section is changed once; A Current / Continuous Indicator that provides a version of the current and subsequent private sections; A section number indicating a section number; Last Section Number indicating the number of the last section; A private data area to which pure data is allocated; And a CRC for detecting a transmission error, and converting navigation data reproduced and separated from the recording medium, that is, the optical disc 1, by using a private section format configured as described above. , Can transmit.

The apparatus and method for transmitting navigation data of a recording medium according to the present invention, which is performed as described above, separates navigation data contained as unpackets and packets into digital data streams read from the recording medium, respectively. A video display device in which the user receives the digital data stream by converting the separated navigation data into an MPEG standard, a PES format, or a private section format, and transmitting the converted navigation data through an IEEE 1394 interface. In addition, the present invention is a very useful invention that not only variably controls the program reproducing operation using the navigation data, but also facilitates a control operation of changing a program list (Title) of a recording medium.

Claims (11)

In the navigation data transmission method of a recording medium, Separating navigation data read from the recording medium; Converting the separated navigation data into a stream of a PES data format; And And transmitting the converted stream in a set transmission format. The method of claim 1, The converted PES data stream is configured to include identification information for identifying the navigation data in the stream identifier, navigation data transmission method of a recording medium. The method of claim 1, The transmission format of step 3 is a navigation data transmission method of a recording medium, characterized in that the isochronous (Isochronous) channel format. The method of claim 1, The converted PES data stream may include a sub-stream identifier (Sub-stream ID) for identifying navigation data; Partition information for providing partition information of the navigation data; And Navigation data transmission method of a recording medium comprising a control data for navigation. The method of claim 4, wherein The control data is a navigation data transmission method of a recording medium, characterized in that it comprises a highlight information. The method of claim 5, And the highlight information comprises only highlight position information and palette information. The method of claim 1, The second step, And converting the entirety of the separated navigation data into a format. The method of claim 4, wherein The second step, And converting a part of the separated navigation data into a format conversion method. In the navigation data transmission method of a recording medium, Separating the navigation data read from the recording medium; Converting the separated navigation data into a stream in a private section format including a table ID; And And transmitting the converted data stream in a predetermined transmission format. In the navigation data transmission method of a recording medium, Converting the recording medium data stream including the navigation data into a stream of a PES data format; And And transmitting a data stream converted into the PES data format by adding an identification code for identifying the navigation data to a transmission format that is set. Separating means for separating the non-packet and the navigation data contained in the packet into the data stream of the recording medium, respectively; Conversion means for converting the separated navigation data into a stream of a PES data format and transmitting the stream; And And control means for controlling the conversion means so that identification information of the converted and transmitted navigation data is added to the stream.