KR100632064B1 - Method for recording digital data stream on high density disc medium and method for reproducing data thereof - Google Patents

Abstract

The present invention relates to a data stream recording method of a high density disk recording medium and a data reproducing method thereof, comprising: a step of recording a data transmission packet in a predetermined recording unit on a high density disk recording medium; And generating and recording management information for the remaining unrecorded section in the recording unit into the header information of the predetermined recording unit, by means of a data stream recording method of a high-density disc recording medium (HDVD-ROM). To generate and record management information for a valid transport packet (TSP) normally recorded as a transport stream (TS) on a high density disk recording medium such as By controlling only the selective transmission, unnecessary data recorded in the padding area of the high-density DVD-ROM can be prevented from being unnecessarily transmitted to the digital television. Of course, it is effective for normal signal processing in the digital television. It is not necessary to generate, record and transmit the transmission time reference information for each transmission packet. Is extremely useful inventions which can maximize the recording efficiency and the transmission efficiency of the disk recording medium.

High density DVD, valid packet management information, valid transmission packet number, pack header information, unnecessary data

Description

Method for recording digital data stream on high density disc medium and method for reproducing data             

FIG. 1 illustrates a configuration of a general DVD-player and a general television (TV).

FIG. 2 shows a recording unit hierarchy diagram of a data stream recorded on a general DVD-ROM and a null data recording area accordingly.

3 and 4 illustrate a recording unit hierarchy diagram of a data stream recorded on a general DVD-ROM, and another null data recording area accordingly.

5 is a diagram showing the configuration of the high-density DVD player (HDVD-Player) and digital television (D-TV) to which the present invention is applied,

FIG. 6 shows a recording unit hierarchy diagram and effective packet management information of a data stream recorded on a high density DVD-ROM according to the present invention;

7 illustrates a data stream recording process of a high density disk recording medium according to the present invention;

8 is a flowchart illustrating an operation of a data reproducing method on a high density disk recording medium according to the present invention.

※ Explanation of code for main part of drawing

11,31,41: Disc 12,42: Optical Pickup

13,43: analog signal processor 14,44: digital signal processor

15 decoder and D / A converter 16,25,35,46 control unit

17, 24, 36, 47: Memory 20: Tuning processing unit

21: decoder 23,34: interface

32: storage stream processor 33: read stream processor

45: TS Mux 100: DVD Player

400: high density DVD player 500: digital television

600: analog television

The present invention selects a valid transport packet that is recorded and stored as a transport stream on a disk recording medium such as a high density digital versatile disc (HDVD), and transmits it to a connected device such as a digital television. A data stream recording method of a high density disk recording medium and a data reproduction method according thereto.

1 is a connection of a DVD player for reading out and playing back video and audio data recorded on a general DVD such as a DVD-ROM and a general television capable of displaying a video. As shown in FIG. 1, the DVD player 100 includes an optical pickup (P / U) for reading data recorded on a disk recording medium 11 such as a DVD-ROM as a high frequency signal. (12); An analog signal processor (13) for analog signal processing the read high frequency signal; A digital signal processor 14 for digitally processing the signal-processed analog signal and outputting the digital signal as a program stream (PS) which is an digital data stream of an MPEG format; And a decoder and a D / A converter 15 for decoding the outputted program stream, D / A conversion into analog audio and video signals, and outputting the same to a general television 600. The DVD-ROM Decodes a program stream (PS) read and reproduced from a general DVD (DVD), such as a DVD, and decodes a program stream (PS) read and reproduced from a general DVD (DVD), such as a DVD-ROM, into analog audio and video signals. And D / A conversion is to be transmitted to the general television (600).

On the other hand, with reference to the accompanying drawings for the recording unit hierarchical diagram of the data stream recorded and stored in a general playback DVD (DVD) such as the DVD-ROM (DVD-ROM) and the corresponding null data recording area accordingly; It will be described in detail as follows.

First, a DVD-ROM includes a recording assembly (SOB; Stream OBject, or VOB: Video OBject) which is recorded and stored with temporal continuity such as one title or program. The recording assembly SOB includes a recording unit (SOBU: Stream OBject Unit or VOBU: Video OBject Unit) composed of a plurality of data packs having a predetermined recording size, and the recording unit SOBU is one. It consists of a navigation pack (NV_PCK) and a plurality of data pack (Data PCK), the data pack (Data PCK), the pack header (Pack Header) information and a plurality of Program Elementary Stream (PES) packet The packet consists of a packet header and a data field in which video, audio, or sub-picture data is recorded.

The recording unit SOBU configured as described above is partitioned including MPEG video data of at least one GOP (Group of Picture) unit including base picture (I-Picture) data. In order to partition the recording unit SOBU, there is a null data recording area, that is, a padding area, shown in FIGS. 2, 3, and 4, for example, recording in the GOP unit. In the case where unnecessary data of 1 byte to 7 bytes needs to be padded recorded in order to partition the unit SOBU, as shown in FIG. 2, 1 byte to 7 in a stuffing field allocated to a packet header. When unnecessary data corresponding to bytes is to be recorded and padding data of 8 bytes or more is required in order to partition the recording unit SOBU in the GOP unit, as shown in FIG. 3, video, audio or sub-picture place In the data field where data is recorded, unnecessary data of the corresponding number of bytes is recorded.

In particular, when padding recording of one or more packets is required in order to partition a recording unit SOBU in the GOP unit, as illustrated in FIG. 4, a data field in which the video, audio, or sub-picture data is recorded. And unnecessary data of the corresponding number of bytes are recorded in the entire packet to be continuously recorded.In this case, unlike the general header information, the unnecessary data is stored in the packet header of the packet in which all unnecessary data is recorded in the entire packet. Is recorded.

On the other hand, as shown in Fig. 2, the management information for the unnecessary data to be recorded is recorded and managed in a stuffing length information field allocated to 3 bits on the pack header.

In the packet header, as shown in FIG. 2, reproduction output time information (PTS) and decoding time information (DTS) are recorded and stored, and audio is read and separated from the packet. The video data stream is decoded according to the decoding time information (DTS) and temporarily stored in a memory or a buffer, and then output to the speaker and monitor of the general television 600 according to the reproduction output time information (PTS).

In this way, audio and video data streams in which unnecessary data is recorded, i.e., packets decoded from a playback DVD (DVD) having a padding area, are decoded, divided into valid data transmission packets and unnecessary data packets, and separated into valid packets. By using the decoding time information (DTS) and the playback output time information (PTS), the audio and video signals are output through the speakers and monitors of a general television, respectively.

On the other hand, the high-density DVD player (HDVD-Player) and the high-definition video display for processing the playback signal processing of the high-density DVD ROM (HDVD-ROM), especially the high-density DVD (HDVD), which is being recently developed Considering that a digital television (D-TV) capable of being connected is used in advance, the type of digital data stream recorded and stored in the high-density DVD-ROM as a transport stream (TS) capable of signal processing in a digital television can be obtained. A method of recording and storing and transmitting a transmission packet (TSP) read out as a type of transport stream (TS) during a reproduction operation directly to a digital television without a separate decoding operation, so that the digital television can decode and signal itself. It is being discussed between related companies.

Therefore, the high-density DVD-ROM is not provided with a decoder for decoding the transmission packet TSP read out from the high-density DVD-ROM. The transmission packet (TSP) read out from the HDVD-ROM is unconditionally transmitted to the digital television without checking whether the transmission packet (TSP) is unnecessary data in the padding area.

In other words, a problem arises in that unnecessary data in the padding area is unnecessarily transmitted to the digital television, in addition to the transmission packet TSP normally recorded in the high-density DVD-ROM.

In addition, in order to process the transmission packet (TSP) and unnecessary data packets read out from the high-density DVD ROM (HDVD-ROM) and the unnecessary data packets in a digital television, and to normally process the signals, the transmission time of each transmission packet except the unnecessary data is transmitted. Since the reference information is to be transmitted together, the generation and recording of the transmission time reference information is required accordingly, which causes another problem that greatly reduces the transmission efficiency as well as the recording efficiency.

Accordingly, the present invention has been made to solve the above problems, and the present invention relates to a valid transport packet that is normally recorded as a transport stream (TS) on a high-density disc recording medium such as a high-density DVD-ROM. To provide a data stream recording method and a data reproducing method of a high-density disc recording medium for generating and recording management information, selecting valid transmission packets which are normally recorded during a reproducing operation, and transmitting the same to a connected device such as a digital television. , Its purpose is.

A data stream recording method of a high density disk recording medium according to the present invention for achieving the above object comprises the steps of: recording a data transmission packet in a predetermined recording unit on a high density disk recording medium; And generating and recording management information on an unrecorded remaining section in the recording unit into header information of the predetermined recording unit.

In addition, the data reproduction method on the high-density disc recording medium according to the present invention, the first step of identifying the number of effective transmission packets contained in the recording unit of a predetermined size on the high-density disc recording medium; And reading out a recording data stream corresponding to the identified number of valid transmission packets from the recording unit and transmitting the recording data stream to the outside.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a preferred embodiment of a data stream recording method of a high density disc recording medium and a data reproduction method according to the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 5 illustrates an embodiment in which a high-density DVD player (HDVD-Player) to which the present invention is applied and a digital television (D-TV) capable of displaying a high-definition image are connected and used. The high-density DVD player 400 The configuration includes: an optical pickup (P / U) 42 for reading out data stored on a disc recording medium 31 such as a high density DVD (ROM) as a high frequency signal; An analog signal processor 43 for analog signal processing the read high frequency signal; And a digital signal processor 44 and a TS mux 45 for processing the digital signal processed by the signal and outputting the digital signal to a transport stream (TS), which is an amp data (MPEG) type digital data stream. A data stream read and reproduced from a high density disk recording medium such as a DVD-ROM is transmitted to the digital television 500 capable of displaying a high quality image.

On the other hand, the recording unit hierarchy and management information in the data stream recorded and stored in the high-density playback DVD (HDVD) such as the high-density DVD ROM (HDVD-ROM), particularly for the effective transport packet that is normally recorded in the type of transport stream The valid packet management information will be described with reference to FIG. 6 as follows.

First, as described above, a transport stream (TS), which is a data stream of a type capable of signal processing in a digital television, is recorded and stored in the high-density DVD ROM (HDVD-ROM). At least one high density stream object (HOB), which is recorded and stored with temporal continuity such as a program, is recorded and stored, and the record assembly (HOB) includes a group of picture (GOP) including base image data. (HDBU) consists of a plurality of recording units (HOBU: HD stream OBject Unit) that includes at least one data stream of each unit, the recording unit (HOBU) is a pack header information (HD_PCK Header) and a plurality of Consists of a plurality of unit packs (HD_PCK) consisting of a transmission packet (TS_PKT), the pack header information (HD_PCK_Header) is a tube for a plurality of transmission packets constituting a unit pack (HD_PCK) Information is stored in the recording.

In the management information recorded and stored in the pack header information HD_PCK_Header, as shown in FIG. 6, a small unit time of counting 9 bits at 27 MHz according to the program time reference information (PCR), in particular, the MPEG (MPEG) standard ( SYS_PCR_ext) and effective packet management information for managing valid transmission packets constituting the transmission time reference information (SYS_PCR_base, SYS_PCR_ext) and the unit pack (HD_PCK), each of which records a large unit time (SYS_PCR_base) that counts 33 bits at 90 KHz. Valid_PKT_Nu) is recorded, and the valid packet management information pads unnecessary data in a unit pack (HD_PCK) of a predetermined recording size so as to partition and record the recording unit (HOBU) into a data stream of a GOP unit. In the case of recording, the number of the last valid transmission packet (TSP) immediately before the unnecessary data is recorded is recorded and managed, and the unnecessary data is recorded in the unit pack (HD_PCK). In other words, if one unit pack consists of all valid transmission packets that are normally recorded, the identification value corresponding to 'FF' may be recorded and managed instead of the number of the last valid transmission packet (Valid_PKT_Nu). have.

FIG. 7 illustrates a data stream recording process of a high-density disc recording medium according to an embodiment of the present invention, in which a recording process is performed in which the mth recording unit (HOBU # m) is partitioned and recorded in at least one GOP unit. In the GOP, the data streams are not all recorded in the unit pack HD_PCK having a predetermined recording size, in particular, in the last n th unit pack HD_PCK #n constituting the m th recording unit HOBU # m. If not, for example, when the data stream of the GOP unit is recorded in the third transmission packet (TSP 3) in the n th unit pack (HD_PCK # n), the n th unit pack (HD_PCK #). In n), there is a padding area in which unnecessary data is recorded.

Accordingly, the valid packet management information (Valid_PKT_Nu) recorded and managed in the pack header information (HDR n: HD_PCK_Header n) of the n-th unit pack (HD_PCK # n) is a transmission packet immediately before the unnecessary data is recorded, that is, normally recorded. The identification value '00000011 (= TSP3)' corresponding to the number of the third valid transmission packet TSP 3 is recorded and managed.

Meanwhile, in the header information of the n-1 th unit pack (HD_PCK # n-1) in which all valid transport packets corresponding to the data stream of the GOP unit are recorded, the n-1 th unit pack (HD_PCK #n) The identification value corresponding to 'FF' is recorded and managed so as to identify that all transmission packets constituting -1) are valid transmission packets normally recorded. For reference, the identification value for the number of the last transmission packet may be recorded and managed instead of the identification value 'FF'.

In this manner, valid packet management information (Valid_PKT_Nu) is generated and recorded on a high-density DVD ROM for a valid transport packet that is normally recorded as a type of a transport stream (TS). Based on the management information (Valid_PKT_Nu), only valid transmission packets that are normally recorded are selected and transmitted. However, the data reproducing method of a high-density disc recording medium for selecting and transmitting only the valid transmission packets to a digital television is described below. Referring to the drawings with reference to the following.

First, FIG. 8 shows an operation flowchart of a data reproducing method of a high density disc recording medium according to the present invention. The control unit 46 of the high density DVD player (HDVD-Player), when a user requests a reproducing operation, receives a high density. The data stream transmission mode S10 for transmitting the data stream read from the DVD-ROM to the digital television D-TV is set, and the pack header HD_PCK_Header is set as described above with reference to FIG. In step S11, the identification value of the valid packet management information Valid_PKT_Nu is confirmed. When the identification value is a value S12 corresponding to 'FF', that is, the corresponding pack HD_PCK is validly recorded. In the case of 'FF', all the transmission packets TSP of the pack HD_PCK read out as a transport stream are transmitted to the connected digital television (S13). )

However, when the identification value is not a value corresponding to 'FF', that is, when unnecessary data is recorded in the pack HD_PCK, an identification value corresponding to the number (Valid_PKT_Nu) of the last valid transmission packet generated and recorded, For example, as shown in FIG. 7, when the last valid transmission packet is the third transmission packet TSP 3, an identification value indicating the number of the third transmission packet TSP 3, '00000011 (= TSP 3) After storing (S15), the transmission packets constituting the pack (HD_PCK) are sequentially read and transmitted to the digital television (S16), and the transmission packets (S16) are sequentially read. If the number of TSP is less than or equal to the third transmission packet number corresponding to the stored identification value '00000011 (= TSP 3)' (S17), the transmission packets TSP 1, TSP 2, and TSP 3 that are sequentially read out are digital television. Data to be read and subsequently read out To determine as the unnecessary data written in is stopped (S18) the transfer operation from being transmitted to the digital television.

Subsequently, a series of operations for searching the pack header HD_PCK_Header of another pack HD_PCK continuously recorded in the pack HD_PCK is repeated until the transmission mode is released (S14).

In this way, based on the valid packet management information recorded and managed in the pack header HD_PCK_Header, only valid transmission packets that are normally recorded during the reproduction operation can be selected, so that only valid transmission packets excluding unnecessary data can be transmitted to the digital television.

The data stream recording method and data reproducing method of the high density disc recording medium according to the present invention as described above are normally recorded as a transport stream (TS) on a high density disc recording medium such as a high density DVD (ROM). Padding of high-density DVD-ROM by generating and recording management information for a valid transmission packet (TSP) and controlling only valid transmission packets to be selectively transmitted based on the management information during a reproduction operation. It is possible to prevent unnecessary data recorded in the area from being transmitted unnecessarily to the digital television, and to generate, record, and transmit the transmission time reference information for each effective transmission packet for normal signal processing in the digital television. Since it is not necessary to use a high-density disc recording medium such as a high-density DVD-ROM, It is a very useful invention that can maximize lock efficiency and transmission efficiency.

Claims (3)

A step of recording a data transfer packet in a predetermined recording unit on a high density disk recording medium; And And generating and recording management information on an unrecorded remaining section in the recording unit in header information of the predetermined recording unit, And the management information is information corresponding to the last packet number of the data transmission packet recorded in the identified recording unit. delete delete

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