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Quick automatic setting method based on UHD decoder

A decoder and automatic technology, applied in the direction of image communication, selective content distribution, electrical components, etc., can solve problems such as difficulty in setting decoder parameters correctly

Active Publication Date: 2019-11-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This brings a lot of difficulties to the correct setting of the decoder parameters, and brings a lot of inconvenience in actual use.

Method used

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  • Quick automatic setting method based on UHD decoder
  • Quick automatic setting method based on UHD decoder

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Please refer to figure 1 , the present invention provides a kind of fast automatic setting method based on UHD decoder, comprising the following steps:

[0022] Step S1: at the encoder end, pack the input data according to the MPEG-2 system standard to form fixed-length transmission packets, and then multiplex these data packets to form a transmission code stream;

[0023] Step S2: Use scalability to modify and adjust the PMT of the transport code stream, and add a private descriptor enc_params in the video loop; the descriptor definition follows the ISO / IEC 13818-1 standard, and simultaneously update the length of the PMT segment, the total number of secondary descriptors length and cyclic redundancy check fields;

[0024] Step S3: the encoder outputs the transmission code stream to the transmission module, and enters the transmission module a...

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Abstract

The invention relates to a rapid automatic setting method based on a UHD decoder, and the method comprises the following steps: S1, packaging and multiplexing of input data is carried out at an encoder end, and a transmission code stream is formed; S2, PMT is modified and adjusted for transmitting a code stream, and a private descriptor enc _ params is added in a video cycle; S3, an encoder outputs a transmission code stream to a transmission module, and the transmission code stream enters the transmission module at the decoder end through a wireless channel; S4, the decoder end receives the transmission code stream output by the encoder end and starts decoding; S5, the decoder filters and decodes a program PMT table on a system layer, analyzes whether an end _ params descriptor exists ornot, and analyzes the end _ params descriptor to complete decoder parameter setting if the end _ params descriptor exists; and if not, parameters from the system layer and the coding layer are extracted, non-dominant parameters are calculated according to the time sequence characteristics of the data, and setting the decoder. Different analysis and extraction methods are adopted according to different results, so that the decoder can normally process and decode code streams output by different encoders.

Description

technical field [0001] The invention relates to a fast automatic setting method based on a UHD decoder. Background technique [0002] With the development of the digital information age, people's demand for high-speed and high-resolution image data is developing, and ultra-high-definition video has become the general trend, which also puts forward higher requirements for the codec of ultra-high-definition video transmission. [0003] For the UHD decoder to work normally, many parameters need to be set, such as: audio and video PID and stream type, resolution, frame rate, scanning mode, delay mode, etc. In addition, some of these parameters are transmitted at the system layer of the stream (such as PID and code stream type, etc.), some are transmitted at the encoding layer (such as scanning mode, frame rate, etc.), and some are not transmitted as direct parameters (ie non-dominant parameters) (such as delay mode). This brings a lot of difficulties to the correct setting of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/434H04N21/4402H04N21/458
CPCH04N21/4345H04N21/4402H04N21/458
Inventor 杜伟庆陈诚斌吴颜鹏苏凯雄林莲巧
Owner FUZHOU UNIV
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