Video Encoding Bitstream Signaling for Parallel Decoding
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Solution Overview
Problem
Current video compression techniques face challenges in efficiently transmitting and storing high-resolution, high-quality video data, leading to increased costs and resource utilization, particularly when parallel decoding is involved.
Innovation Solution
A method and apparatus for signaling encoded video information using a bitstream that includes entropy-encoded quantized transform information, with offset information specifying entry points for parallel decoding, allowing for byte-aligned decoding units and improved encoding and decoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If video data is transmitted or stored using conventional methods, then the transmission and storage can be performed, but the costs increase and resource utilization becomes inefficient
Solution Approach 1:
The patent divides the video processing into separate encoding and decoding stages, with the encoder compressing video data using transform coefficients and quantization, then transmitting only the essential parameters. The decoder reconstructs the video from these compressed parameters. This segmentation allows efficient transmission of compressed data rather than raw video, reducing bandwidth and storage requirements.
2Manufacturing precision
If high-resolution and high-quality video is transmitted or stored, then the video quality improves, but the amount of information increases leading to higher costs
Solution Approach 1:
The patent extracts only the essential visual information from high-resolution video through transform coding and quantization. Instead of transmitting all pixel data, it extracts transform coefficients that represent the most important visual features, then transmits these compressed coefficients along with prediction parameters. This extraction maintains perceived video quality while dramatically reducing data volume.
3Speed
If parallel decoding is used, then the decoding speed improves, but the complexity of managing decoding entry points and byte alignment increases
Solution Approach 1:
The patent performs preliminary actions during encoding by organizing transform coefficients and prediction parameters in a standardized bitstream format with explicit syntax elements. This preliminary structuring allows the decoder to quickly parse and identify entry points for parallel decoding without complex analysis, enabling multiple decoding streams to be initiated simultaneously with reduced management overhead.
Data Source
AI summary
The present invention relates to video encoding and decoding method and apparatus, and a video encoding method according to the present invention comprises the steps of: entropy-encoding quantized transform information; and transmitting the entropy-encoded information as a bitstream, wherein the bitstream includes information indicating pieces of information to be parallel decoded in byte units.