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Detecting method for tag basic code flow data packet of digital television

A technology of basic code stream and detection method, applied in the direction of TV, transmission of TV signals through single/parallel channels, electrical components, etc., can solve the problems of H/W increase, PES can not confirm, can not detect error status, etc., to reduce The effect of H/W

Inactive Publication Date: 2007-02-07
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When storing multiple PESs sequentially in different memories, the length corresponding to the type of PES to be stored must be additionally stored, so there is a disadvantage of increasing H / W (hardware)
[0015] Also, PES with an undefined length cannot confirm these. If an error occurs in the data stream and the continuity_counter skips the default maximum value of 16, then only the continuity_counter confirmation cannot detect the error state
Therefore, if the length is confirmed at this time, there may be an unpredictable state

Method used

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  • Detecting method for tag basic code flow data packet of digital television
  • Detecting method for tag basic code flow data packet of digital television
  • Detecting method for tag basic code flow data packet of digital television

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Embodiment Construction

[0026] The composition and function of an embodiment of the method for detecting elementary stream data packets (hereinafter referred to as: PES data packets) with headers of digital television of the present invention will be described below with reference to the accompanying drawings.

[0027] image 3 It is a flow chart representing the digital TV PES packet detection method of the present invention.

[0028] Firstly, while storing the PES payload, the present invention confirms the payload_unit_start_indicator information and the continuity_counter value of the TS packet header instead of calculating the PES length in order to detect the start and end of a certain unit of PES.

[0029] S11, firstly, set the digital TV in an initialization mode.

[0030] S12. After the above settings are made, receive the TS data packet.

[0031] S13, judging whether the received TS data packet is in initialization mode.

[0032] Judging whether the received TS data packet is in the init...

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PUM

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Abstract

The invention relates to a basic encode stream data pack checking method with pack head in digit TV, wherein it comprises: receiving TS stream, judging if the PES data pack of TS stream is the first byte data pack initialize mode at one unit; if it is, recovering the initialize mode, and storing the first byte PES data pack; if it is not, judging if it is the continuous data pack received only after the first byte data pack; if it is not the initialize mode and continuous data pack, judging if it is discontinuous data pack; if it is not initialize mode and discontinuous data pack, confirming it as initialize mode and continuous data pack, and displaying one interrupt signal that ending one unit data pack storage. The invention detects the start and end of PES in TS stream and informs the user.

Description

technical field [0001] The present invention relates to the invention of digital TV, especially refers to a kind of digital TV PES (Packetized Elementary Stream: basic code stream with packet header) data packet detection method for detecting and displaying the beginning and end of PES in the TS stream. Background technique [0002] Currently, many digital broadcasts using the MPEG2 format use 188-byte transport (TS) packets as the data stream format for transmitting data. [0003] The above-mentioned TS packet is composed of a 4-byte fixed header (header) including packet information and a payload (payload) equivalent to data. [0004] The header of the above TS packet is as [Table 1], which is 4-byte data including sync-byte, payload_unit_indicator and continuity_counter. [0005] Syntax No. of bits Mnemonic transport_packet(){ sync_byte transport_erro_indicator payload_unit_start_indicator transport_prio...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/12H04N21/236H04N21/434
Inventor 徐永山
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI