Method and apparatus for writing information on picture data sections in a data stream and for using the information

A technology of image data and data, which is applied in the field of transmission packet identification image data, and can solve problems such as only digital TV broadcasting

Inactive Publication Date: 2007-10-17
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The TV station currently broadcasts both analogue and digital broad

Method used

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  • Method and apparatus for writing information on picture data sections in a data stream and for using the information
  • Method and apparatus for writing information on picture data sections in a data stream and for using the information
  • Method and apparatus for writing information on picture data sections in a data stream and for using the information

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Embodiment Construction

[0025] In order that the present invention may be thoroughly understood, preferred embodiments thereof will now be described with reference to the accompanying drawings.

[0026] A method of recording a digital data stream on an HD-DVD having a storage capacity greater than that of DVD+R / -R will now be described first.

[0027] Fig. 1 shows the structure of an HD-DVD transport stream. The size of each packet group (record block) is 32,768 bytes. Since a packet group is a basic unit of data encoding with an error correction code (ECC), it is necessary to read the entire packet group and perform error correction to retrieve the original data recorded on the HD-DVD.

[0028] One packet group (record block) includes 16 logical blocks. A logical block is a basic unit of data read or data write. As shown in FIG. 1, one packet group of 32,768 bytes long includes 1 packet group header and 170 transport packets (TP). The length of the packet group header is 128 bytes, and the lengt...

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Abstract

When recording video data in a plurality of recording blocks on a recording medium while organizing the video data into navigation units, the present invention records the size of the first picture data in each of the navigation units expressed in terms of the number of transport packets carrying the first picture data. Alternatively, the present invention adds 128-byte header information to each of the recording blocks, in which case if a recording block contains the last data of the first picture in each of the navigation units, position information for indicating the end position is written in the header information. The present invention thereby can specify the data section of the first picture in each navigation unit precisely.

Description

technical field [0001] This document relates to a method and apparatus for recording information about segments of image data carried in an incoming sequence of transport packets when recording video data, and identifying image data from the recorded transport packets based on the recorded information. Background technique [0002] Optical discs have replaced magnetic tapes as a new recording medium for recording video signals. DVD+ / -R is a representative rewritable optical disc on which video data of up to 6 hours of playback time can be recorded. [0003] Television stations currently broadcast both analog and digital, but only digital TV broadcasts will be available in the near future. Digital broadcasting provides better video quality than analog broadcasting. In order to record digital television signals, a new type of recording medium having a larger storage capacity than DVD+ / -R is required. [0004] For this reason, larger-capacity optical discs are being develope...

Claims

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Application Information

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IPC IPC(8): G11B20/10
CPCG11B27/34G11B20/10
Inventor 朴成浣
Owner LG ELECTRONICS INC
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