KR100348882B1 - Method and apparatus for providing program specific information recorded on data stroage device - Google Patents

Abstract

The present invention relates to a method for providing program specification information of a disc recording medium on which program specification information is not recorded. When the program specification information is required to be transmitted, the present invention is generated by using previously stored information, and the time length of the generated program specification information. Search and verify; After generating the transmission time information of the head data stream to be transmitted and the time information that differs by the identified time length, the transmission packet is configured by adding the generated time information to the program specification information to be transmitted and corresponding to the data stream. As a method of transmitting before a transmission packet, in a digital television, it is possible to continuously separate and decode a transmission packet of a received data stream, thereby preventing data loss due to visual information inconsistency of the transmission packet. .

Description

Method and apparatus for providing program specification information of an information recording medium {Method and apparatus for providing program specific information recorded on data stroage device}

The present invention provides program specification information (PSI :) for separating and decoding data streams read and transmitted from an information recording medium such as a high density digital versatile disc (HDVD) by digital television to be separated and decoded into audio / video data. A program specification information providing method of an information recording / reproducing apparatus that provides Program Specific Information or Program System Information Protocol (PSIP), and an information recording / reproducing apparatus providing program specification information.

Recently, digital televisions (D-TVs) for receiving digital broadcast signals and outputting high-definition video screens have been rapidly spreading. The digital broadcast signals received from the digital televisions include digital video and audio. In addition to the signal, program specification information (PSI, hereinafter referred to as 'PSI') for providing various information about a broadcast program is intermittently included and transmitted.

Accordingly, the digital television divides and decodes the received digital broadcast signal into audio / video data using program specification information (PSI) intermittently transmitted and received.

On the other hand, a high-density DVD player (HDVD-Player) that reads and reproduces data from a high-density DVD (HDVD) currently under development, as shown in FIG. 1, outputs a high resolution video screen through a digital interface such as IEEE 1394. It is being developed under the premise that the digital television 200 will be used in connection with the digital television 200. In this case, the program specification for selecting a data stream transmitted from the high-density DVD player 100 to separate and decode the audio / video data into audio / video data is selected. Information PSI is needed.

Therefore, in the high density DVD player 100, a data stream read from the high density DVD, in particular, an MPEG transport stream (TS) is transmitted to a digital television connected through a digital interface such as IEEE 1394. As illustrated in FIG. 2, program specification information including a program association table (PAT), a program map table (PMT), a conditional access table (CAT), and the like. PSI) should be transmitted in a transport packet suitable for a transport stream (TS).

Accordingly, recently, among related companies, intermittent periodic transmission of program specification information (PSI) for a transport stream (TS) transmitted to a digital television connected and connected through a digital interface such as IEEE 1394. For this purpose, as shown in FIG. 3, a method of distributing and recording data in a high-density DVD data recording area and reading and transmitting data and program specification information recorded in the data recording area may be considered.

However, in the case of distributing and recording the program specification information (PSI) in the high-density DVD data recording area as described above, the recording capacity of data corresponding to audio and video is greatly reduced, resulting in a decrease in recording efficiency of the high-density disc. In addition, when a playback section of a high density DVD is arbitrarily changed according to a user's key input or a reset occurs on a digital interface such as IEEE 1394, digital television is distributed to a data recording area. Until the recorded program specification information is transmitted and received, the transport stream transmitted from the high-density DVD player cannot be separated and decoded into audio / video data, thereby preventing the output of a naturally continuous video screen. The problem arises.

In the case of converting and transmitting the program specification information into a transmission packet suitable for the transport stream TS as described above, time information of the transmission packet corresponding to the program specification information and subsequent data streams are continuously transmitted. Program Clock Reference (PCR) of the corresponding transmission packet must be continuous in time.

That is, in the digital television, the transmission packet transmitted as described above is separated and decoded on the basis of the program time reference information (PCR). Therefore, in order to prevent data loss due to the time information mismatch of the transmission packet, There is an urgent need for a method of ensuring that program time reference information (PCR) of a corresponding transmission packet and time information of a transmission packet corresponding to the program specification information (PSI) are mutually continuous in time.

The present invention was created to solve the above problems, and when a stream of an information recording medium on which program specification information is not recorded is transmitted to a digital television or the like, a video screen can be stably output from a digital television. The present invention provides a method for transmitting program specification information.

Another object of the present invention is to provide a method for recording program specification information necessary for stably outputting a video screen in a digital television or the like and a recording medium recorded as such.

Still another object of the present invention is to provide an information recording / reproducing apparatus for transmitting program specification information so as to stably output a video screen in a digital television.

1 is a diagram illustrating a connection state between a general high-density DVD player (HDVD-Player) and a digital television (D-TV),

2 shows a configuration of general program specification information (PSI),

3 schematically shows a recording area of a conventional proposed high density DVD (HDVD),

4 schematically shows a recording area of a high density DVD according to the present invention;

5 shows general management information (PSI_GI) of program specification information according to the present invention.

6 illustrates a configuration of a high density DVD player according to the present invention,

7 shows a process of providing program specification information according to the present invention.

※ Explanation of code for main part of drawing

100,300: high density DVD player 200: digital television

31: high density DVD (HDVD) 32: optical pickup (P / U)

33: analog signal processor 34: digital signal processor

35: TS mux 36: interface unit (I / F)

37: Micom 38: Memory

The method for providing program specification information and the information recording / reproducing apparatus according to the present invention for achieving the above object, in transmitting data as a transport stream, whenever the data stream to be transmitted is the first transmission, the data stream Prior to the transmission, it is characterized by generating a transmission packet of the program specification information by using the program specification information previously stored in the storage means, not the information carrier.

In the transmission of the program specification information, the time length of the program specification information is checked, the time information of the leading data stream and the time information differing by the identified time length are generated, and the generated time information is transmitted. After the transmission packet is configured in addition to the program specification information, the transmission packet may be transmitted before the transmission packet corresponding to the data stream.

Hereinafter, a preferred embodiment of a method for providing program specification information of a high density disk recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 4 illustrates a configuration of a high density DVD according to an embodiment of the present invention, in which a data recording area (Area 1) in which audio and video data is recorded as a data stream in a program unit, and the program And an information recording area (Area 2) in which management information such as navigation information for managing and controlling a data stream of a unit is recorded. The information recording area (Area 2) is shown in FIG. As described above, the program specification information (PSI), that is, the data stream transmitted from the high-density DVD player (HDVD-Player) in a digital television connected through a digital interface such as IEEE 1394 is selected and separated and decoded into audio / video data. Since the program specification information provided for processing is intensively recorded, as described above with reference to FIG. The recording capacity of the data recording area (Area 1) for storing, recording a data stream corresponding to the audio and video can be secured maintained.

In order to concentrate and record the program specification information, the program specification information periodically included in the received digital broadcast signal, that is, the program association table (PAT), the program map table (PMT), and the condition described above with reference to FIG. The program specification information (PSI) including the null access table (CAT) is detected and separated, and the program specification information to be separated is signal-processed into digital stream specification information data suitable for recording on a recording medium. When the separated program specification information is new program specification information which is different from the previously recorded program specification information which has been previously outputted separately, is compared and discriminated. Concentrate sequentially on the recording area to be recorded.

At this time, the program specification information to be recorded is recorded at the start / start of the recording assembly HOB in order to record in correspondence with a recording object (HOB: HD OBject) unit in which a data stream having a temporal continuity like a single program is logically partitioned. Recorded in association with End time information.

For reference, in addition to the program association table (PAT), the program map table (PMT), and the conditional access table (CAT), various expression control information according to the characteristics of the data stream read and transmitted from the recording medium may be added as the program specification information. Can be modified.

On the other hand, in the PSI general management information (PSI_GI: PSI General Information) for managing program specification information concentrated in the high density DVD information recording area (Area 2) as described above, as shown in FIG. 5, the PCR offset (PCR_offset) is shown. ) Information is recorded and managed, wherein the PCR offset (PCR_offset) information is information corresponding to a time length of a transmission packet (PSI_Packet) itself corresponding to program specification information, and a transmission packet (PSI_Packet) corresponding to the program specification information. Time information PSI_PCR has time information that is ahead of the program time reference information PCR1 of the first transmission packet TP1 corresponding to the data stream to be transmitted by a time corresponding to the PCR offset.

For example, assuming that the PCR offset PCR_offset is 500, the program time reference information PSI_PCR of the PSI packet corresponding to the program specification information transmitted immediately before the first transmission packet TP1. Has a time value, 'PCR1-500', which is '500' clock ahead of the program time reference information PCR1 of the first transmission packet TP1, and also corresponds to the program specification information PSI. In case of transmitting two transmission packets (PSI Packet 1, PSI Packet 2) continuously, the program time reference information (PSI_PCR 1) of the first transmission packet (PSI Packet 1) corresponding to the program specification information is' PCR1-( 500 x 2) ', and the program time reference information (PSI_PCR 2) of the second transmission packet (PSI Packet 2) corresponding to the program specification information becomes' PCR1-(500 x 1)', and then is transmitted to the data stream to be transmitted. Program time reference information (PCR) of the first transmission packet (TP1) 1) and 'PCR1-(500 x 2)' and 'PCR1-(500 x 1)' are respectively sequentially preceded by the PCR offset (PCR_offset = '500').

Therefore, as described above, the program time reference information PSI_PCR of the PSI packet corresponding to the program specification information is the program time reference information PCR1 of the first transmission packet TP1 corresponding to the data stream to be transmitted later. In the digital television, a PSI packet corresponding to program specification information received through a digital interface such as IEEE 1394 is synchronized with the corresponding program time reference information (PSI_PCR). In addition, as described above, the transmission packet TP1 of the data stream having the program time information PCR1 that is continuously temporally separated and decoded can be continuously separated and decoded.

Hereinafter, the structure and operation of the high density DVD player for reading and providing data stream and program specification information from the high density DVD according to the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 6 illustrates a configuration of a high-density DVD player (HDVD-Player) to which the program specification information providing method according to the present invention is applied. The high-density DVD player 300 includes program specification information (PSI). An optical pickup (P / U) 32 that reads out the recording signal of the high density DVD 31 focused on the recording area 2 and outputs it as an electrical signal; An analog signal processor 33 for analog signal processing and outputting the electric signal output from the optical pickup as a digital signal; A digital signal processor (34) for signal processing the digital signal to output digital data and program specification information (PSI); A TS mux 35 for muxing the digital data and program information and outputting the digital data and program information as a transport stream (TS); An interface unit 36 for transmitting the transport stream TS muted with the program specification information PSI to a digital television 200 connected through a digital interface such as IEEE 1394; A microcomputer 37 for controlling operations of the TS mux 35 and the interface unit 36; And a memory 38 for storing data necessary for the control operation.

In the high-density DVD player 300 configured as described above, the microcomputer 37 transmits and receives a command from the digital television 200 connected and connected through the user's key input or interface unit 36, and IEEE 1394. According to a bus reset generated on a digital interface, such as a bus reset, the program specification information searched and read from the information recording area (Area 2) of the high density DVD 31 on which program specification information (PSI) is recorded is read. A transport stream (TS), i.e., an audio / video data stream, which is transmitted through a digital interface such as IEEE 1394, is selected by the digital television 200, separated into audio and video data, and then decoded normally. The processing operation can be performed, and the program specification information (PSI) is provided as described above. When you explain how below.

FIG. 7 illustrates a transport stream TS transmitted from the high-density DVD player 300. In the microcomputer 37, as described above, the user inputs a user through a key input or an interface unit 36. Referring to FIG. The information recording area (Area 2) of the high density DVD 31 on which program specification information (PSI) is recorded, in accordance with commands transmitted and received from the connected digital television 200, bus reset generated on a digital interface such as IEEE 1394, and the like. The program specification information, which is read out from the program, is transmitted and provided to the digital television 200. For example, as shown in FIG. 7, a recording stream (HDB OBject), which is a recording unit corresponding to a program unit, is provided. While reading the data stream of the Nth recording set HOB N and transmitting it to the transmission packet TP, the data stream of the N + 1th recording set HOB N + 1 is read. In case of transmission, TS specification program information (PSI N + 1) corresponding to the N + 1th recording assembly (HOB N + 1) searched and read from the information recording area (Area 2) of the high density DVD (31) is TS mux. By applying to (35), it is controlled to be transmitted before the first transmission packet TP1 corresponding to the data stream of the N + 1th recording aggregate HOB N + 1.

In this case, it is preferable to repeatedly transmit the transmission packet (PSI Packet) of the program specification information transmitted as described above to prevent transmission and reception errors, and the like, and to transmit the program time reference information of the transmission packet (PSI Packet). PSI_PCR) is a time value that is earlier than the program time reference information PCR1 of the first transmission packet TP1 corresponding to the data stream to be transmitted later by PCR offset time, that is, as described above with reference to FIG. In the case where the number of PSI packets of the program specification information PSI repeatedly transmitted is five times, it is generated and added based on PCR offset (PCR_offset) information recorded and managed in the information PSI_GI. As described above, the PCR offset information recorded and managed in the program time reference information (PCR1) and the PSI general management information (PSI_GI) of the first transmission packet TP1 corresponding to the N + 1th recording set (HOB N + 1) is included. Based on The program time reference information PSI_PCR of the transmission packet PSI_Packet corresponding to the program specification information PSI is calculated.

Accordingly, the transport packets corresponding to the program specification information transmitted before the first transport packet TP1 corresponding to the data stream of the N + 1 th record set (HOB N + 1) (PSI Packet 1,2,3,4). The program time reference information (PSI_PCR 1,2,3,4,5) of (5) is 'PCR1- (PCR_offset x 5)', 'PCR1- (PCR_offset x 4)', 'PCR1- (PCR_offset x 3)' It has visual information corresponding to 'PCR1- (PCR_offset x 2)' and 'PCR1- (PCR_offset x 1)'.

Therefore, in the digital television 200, in synchronization with the program time information PSI_PCR 3 of the M th transmission packet (PSI Packet), for example, the third transmission packet (PSI Packet 3) corresponding to the program specification information (PSI). Even if the received transmission packet is selected and separated and decoded, as described above, the transmission packets (PSI Packet 4, PSI) having program time reference information (PSI_PCR 4, PSI_PCR 5, PCR 1 ...) that are continuous in time Packet 5, TP1 ..) can be selected continuously and separated and decoded.

For reference, the program specification information PSI transmitted as described above is obtained from a high density DVD in addition to the program association table PAT, the program map table PMT, and the conditional access table CAT described above with reference to FIG. 2. Various information may be added according to the characteristics of the data stream to be read and transmitted. In addition, the microcomputer 37 reads a signal recorded on the high density DVD 31 and transmits the signal to the transport stream TS. In addition to the case of reading and transmitting the data stream, the first time the data stream is transmitted, a long track jump is performed in which the read section of the high density DVD 31 is largely changed by a user's key input or the like. Of the digital television 200 connected and connected via a digital interface such as IEEE 1394 is turned on. Or the channel is switched, the corresponding command is transmitted to the microcomputer 37, and when the reset occurs on a digital interface bus such as IEEE 1394, the program specification information (PSI) is provided as described above. In addition, a transport stream (TS) received from a digital television 200 connected and connected through a digital interface such as IEEE 1394 may be selected and separated and decoded into audio / video data.

The embodiments up to now are based on the assumption of a high density disk medium as the information recording medium, but the operation of the above-described embodiment also applies to an apparatus in which the information recording medium is a magnetic recording medium and records and reproduces the contents of the video screen as a digital stream. The same can be applied without modification.

In contrast to the high-density DVD disc described above, in the case of a recording medium of a DVD disc (DVD) in which program specification information is not recorded, the program specification information is generated by an apparatus for reproducing the same, and the same method as described above. In this way, the program specification information packet can be provided to the digital television before transmission of the data stream.

For example, in the recording / reproducing apparatus of Fig. 6, when the mounted disk is a conventional general DVD disk, and there is no specification information for the recorded program, the microcomputer 37 performs the above-described conditions, i.e., IEEE 1394 and the like. When the power of the digital television 200 connected and connected through the same digital interface is turned on or the channel is switched, a corresponding command is transmitted to the microcomputer 37 and received. In order to generate the program specification information such as A / V parsing information before transmitting the data, the packet of the program specification information is used by using the information stored in the memory 38 in advance. The PCR is generated and recorded as in the above-described method, and then transmitted to the digital television 200 prior to transmission of the data stream.

According to the present invention, a method for providing program specification information of an information recording medium and an information recording / reproducing apparatus for performing the same are recorded with management information for managing and controlling data recorded on an information recording medium such as a high density DVD. The program specification information (PSI) is concentrated in the specific recording area to be recorded, and the program time information of continuity is preceded by the program time reference information (PCR) of the data transmission packet before the data stream to be transmitted, if necessary. By generating a and providing as a transmission packet, in the digital television, the transmission packet (PSI Packet) corresponding to the received program specification information is selected and synchronized with the corresponding program time reference information (PSI_PCR) to separate and decode, Subsequently, the transmission packet (TP) of the received data stream is continuously separated and decoded. Is able to manage, it is possible to fundamentally prevent the data loss caused by the mismatch of the time information transmission packet.

Claims (13)

In a method for transmitting data in a transport stream, Preparing data to be transmitted from the information recording medium; And Whenever the data stream to be transmitted is the first transmission, a transmission packet of program specification information is generated based on the information stored in the information storage means provided in the reproducing apparatus other than the information recording medium, and then transmitted prior to the transmission of the data stream. Program specification information providing method of an information recording medium comprising the step. The method of claim 1, wherein the second step comprises: searching and checking a time length of program specification information; Generating time information that is different from the transmission time information of the first data stream to be transmitted by the identified time length; And And constructing a transmission packet by adding the generated time information to program specification information to be transmitted, and then transmitting the packet before the transmission packet corresponding to the data stream. 3. The method of claim 2, wherein the time length information of the first step is recorded and stored on management information for managing the program specification information. The program according to claim 1, wherein the step (2) generates at least two transmission packets corresponding to the program specification information and transmits them before the transmission packets corresponding to the head data stream. How to provide specification information. The program specification information providing method according to claim 1, wherein the first transmission is a first transmission after a position of a data stream to be reproduced is changed. The method of claim 1, wherein the first transmission is a first transmission after a device receiving a data stream to be reproduced is turned on. The method of claim 1, wherein the initial transmission is determined at the time of transmission of stream specification information when a stream of a new stream data unit is reproduced. The method of claim 1, wherein the first transmission is the first transmission after a data transmission / reception bus with a device receiving a data stream to be reproduced is reset. The method of claim 1, wherein the first transmission is a first transmission after a channel of a device receiving a data stream to be reproduced is changed. An apparatus for reproducing an information recording medium, Reproducing means for reproducing the data stream recorded on the information recording medium; And Each time the first transmission of the data stream reproduced by the reproducing means generates a transmission packet of the program specification information based on the information stored in the information storage means other than the information recording medium, and transmits it prior to the transmission of the reproduced data stream. And a control means for reproducing the information recording medium. 12. The apparatus of claim 10, wherein the control unit records and transmits program time reference information that is earlier than the program time reference information recorded in the transmission packet of the reproduced data stream, in the transmission packet of the generated program specification information. An apparatus for reproducing an information recording medium. The reproducing apparatus of claim 10, wherein the control means generates and transmits at least two transmission packets of the program specification information. A method of recording a received digital data stream, Receiving a digital data stream; Separating program specification information from the received data stream and recording the data stream on an information recording medium; And And recording the separated program specification information in an area separate from the recording area of the data stream.