2 results about "Coding distortion" patented technology

The application belongs to the technical field of optical communication, and discloses an environment-adaptive optical signal wavelength conversion and regeneration system and method; transient power fluctuation characteristics and rate characteristics are obtained by performing feature extraction on input signal light; the thermal environment state of a semiconductor optical amplifier is monitored by using reference light to determine a gain drift amount; the probe light power is dynamically configured based on the gain drift amount and the rate characteristics, and transient fine adjustment is performed on the bias current according to the transient power fluctuation characteristics; the input signal light and the dynamically configured probe light are coupled into the semiconductor optical amplifier, and conversion light is obtained by using cross gain modulation effect; the conversion light is subjected to code distortion evaluation, and pre-emphasis instructions are generated and fed back to the input signal light modulation link. The application realizes automatic compensation under environment change and effectively suppresses code distortion.

The application provides a video encoding method and device, electronic equipment and medium, and relates to the technical field of video encoding. The method comprises the following steps: determining a prediction encoding distortion degree of a to-be-encoded unit based on pixel data of a reference encoding unit in a to-be-encoded video, the reference encoding unit being an already-encoded encoding unit in the to-be-encoded video, and the encoding unit being any one of an encoding block, an encoding frame and an encoding frame group in the to-be-encoded video; determining a rate-distortion trade-off coefficient of the to-be-encoded unit based on the prediction encoding distortion degree and a reference rate-distortion parameter; determining an encoding quantization value of the to-be-encoded unit based on the rate-distortion trade-off coefficient and a preset distortion degree mapping relationship, so as to encode the to-be-encoded unit according to the encoding quantization value and obtain a target encoding video. The method realizes reasonable allocation of encoding quantization values to video frame images by taking the encoding distortion degree as a prediction basis, and effectively improves the stability and adaptability of the video encoding effect.