Video Transcoding Quantization Parameter Adjustment

The patent extracts and removes the four-channel encoding step from the transcoding process. By directly adjusting quantization parameters on the original video channels without separating into four channels, the method eliminates the time-consuming encoding process while maintaining quality control through parameter optimization.

The patent changes the encoding approach from spatial channel separation (four-channel encoding) to parameter optimization (quantization parameter adjustment). By modifying quantization parameters based on video content characteristics, the method achieves quality control without the time penalty of four-channel encoding.

The patent removes the complex four-channel encoding architecture and replaces it with a simpler direct encoding approach that operates on the original video channels, reducing computational complexity while maintaining processing effectiveness through targeted parameter adjustment.

Instead of the conventional approach of separating video into four channels for processing, the patent inverts the methodology by processing the original channels directly with optimized quantization parameters, achieving comprehensive processing through a simplified path.

The patent implements feedback control by calculating the ratio of sum of absolute transformed differences (SATD) to bit rate and using this metric to dynamically adjust quantization parameters. This closed-loop approach ensures quality stability by responding to actual video content characteristics while maintaining encoding efficiency.

The patent optimizes quantization parameters based on the calculated SATD/bit rate ratio, changing parameters adaptively according to video content complexity. This approach maintains encoding speed while reducing quality fluctuations by allocating bits more efficiently across different video segments.