Signal format automatic detection method for decoder
A signal format and automatic detection technology, applied in the direction of image communication, selective content distribution, electrical components, etc., can solve the problem that the decoding of the decoder cannot be performed normally
Inactive Publication Date: 2016-04-06
HUIZHOU WELLAV TECH
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[0003] The purpose of the present invention is to provide a signal format automatic detection method for a decoder, which solves the problem that the decoder cannot perform normal decoding due to the change of the signal format
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[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, where the schematic embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0021] refer to figure 1 , 2 , the decoder signal format automatic identification method of the present invention, described method comprises the following steps:
[0022] (1) When the system is turned on, an analysis thread and a processing thread are created after the initialization is completed;
[0023] (2) After the processing thread is created, it enters the dormant state. After the event of signal format change occurs, the processing thread will be awakened. According to the specific event generated, it will be processed through the rules set by the user or the default rule; specifically, if the user sets If the user does not set a rule, it will be processed according to the defa...
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The invention discloses a signal format automatic detection method for a decoder. The method comprises the following steps: (1) after system startup, performing initialization and creating an analyzing thread and a processing thread; (2) after the processing thread is created, entering a hibernation state, awakening the processing thread after the occurrence of a signal format change event, and performing processing according to a generated specific event through a rule set by a user or a default rule; (3) in the analyzing thread, firstly judging whether a signal is locked by the decoder or not, and if the signal is locked, acquiring a relevant information parameter; (4) judging whether signal streams are saved lastly or not according to relevant information, if so, performing a further analysis, and otherwise, saving a relevant parameter; and (5) performing a parameter comparison, and analyzing a signal format change situation. Through adoption of the method, the problem that the decoder cannot decode normally due to signal format changes is solved.
Description
technical field [0001] The invention relates to an automatic signal format detection method for a decoder, mainly for the intellectualization of a front-end audio and video decoder, and can be applied to radio and television front-end equipment products. Background technique [0002] The traditional decoder first searches for channels, analyzes the format of the data in the signal, and then configures the decoding chip according to the format of the signal to decode. If the format of the signal source changes during playback, it may cause the decoding part to be affected by the format. It does not correspond to the occurrence of decoding interruption or partial decoding failure. For example, during playback, if the audio stream type of the signal source changes, the decoding chip will fail to decode the audio due to incorrect decoding parameters, resulting in no audio output. Contents of the invention [0003] The purpose of the present invention is to provide a signal fo...
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IPC IPC(8): H04N21/4385H04N21/81
CPCH04N21/4385H04N21/8193
Inventor 黄华达
Owner HUIZHOU WELLAV TECH