A method for testing time delay of image encoding and decoding based on sei transmission

Abstract

The invention discloses a method for testing time delay of image encoding and decoding based on SEI transmission. The invention includes the following steps: (1) After the encoder acquisition module detects the first line of the input image, writes the time delay identification in the image, and at the same time Output time delay test pulse; (2) Encoder encoding module extracts time delay identification before encoding and writes it into the SEI field of compressed code stream; (3) Decoder extracts time delay identification from code stream before decoding, and Output time-delay pulse while decompressing image display; (4) Obtain time-delay information by measuring two pulses at the same time through oscilloscope. The time delay testing method of the image encoding and decoding system implemented by the invention has extremely high precision, is simple to operate, and is easy to realize, which provides the possibility for the development, debugging and testing of the image encoding and decoding system with low delay.

Description

technical field [0001] The invention belongs to the technical field of image encoding and decoding, and in particular relates to an image encoding and decoding time delay testing method. Background technique [0002] The image encoding and decoding system is an important part of the UAV data link transmission system. Image encoding and decoding and transmission delay are one of the key indicators of the UAV's "human-in-the-loop" control system. If the delay does not meet the design requirements On the one hand, it affects the accuracy of the operator's control of the mission load, making it difficult to capture and track the target; on the other hand, it affects the accuracy of the operator's control of the aircraft, especially in the take-off and landing stage and even affects flight safety. Therefore, it is necessary to accurately test the image codec delay in the design stage. SUMMARY OF THE INVENTION [0003] The present invention proposes an image encoding and decodi...

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Problems solved by technology

[0002] The image codec system is an important part of the UAV data link transmission system. The image codec and transmission delay are one of the key indicators of the UAV "human-in-the-loop" control system. If the delay does not meet the design requirements On the one hand, it affects the accuracy of the operator's control of the task load, making it difficult to capture and track the target; on the other hand, it affects the accuracy of the operator's control of the aircraft, especially during takeoff and landing, and even affects flight safety.

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