Image encoding and decoding delay test method based on SEI transmission

Abstract

The invention discloses an image encoding and decoding delay test method based on SEI transmission, comprising the following steps: (1) after detectin the first line of an input image, an encoder acquisition module writes a delay test identifier in the image, and simultaneously outputs a delay test pulse; (2) an encoder encoding module extracts the delay test identifier and writes the SEI field ofa compressed code stream before encoding; (3) a decoder extracts the delay test identifier from the code stream before decoding, and outputs the delay test pulse while decompressing the image display; and (4) an oscilloscope simultaneously measures two pulses to acquire delay information. The delay test method of the image encoding and decoding system implemented by the invention has extremely high precision, simple operation and easy implementation, which provides a possibility for development, debugging and testing of a low-latency image encoding and decoding system.

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 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 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 during take-off and landing, and even affects flight safety. Therefore, it is necessary to accurately test the image codec delay in the design stage. Contents of the invention [0003] The invention proposes an image codec delay test method based on SEI transmission to complete...

AI Technical Summary

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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