Video Decoding Apparatus Low Delay Bitstream Management
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Solution Overview
Problem
Current video coding systems face challenges in delivering high-quality video across a wide range of devices with different sizes, resolutions, and connectivity, requiring improved compression and bandwidth management to meet growing demands and competitive pressures.
Innovation Solution
The implementation of a video coding system that employs High Efficiency Video Coding (HEVC) standards, utilizing syntax structures like HRD and VUI to encode and decode video content efficiently, allowing for finer control over bitrates, resolutions, and frame rates, and enabling reduced video bitstream size and buffering requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If video compression is increased to reduce bitstream size, then bandwidth requirements are reduced, but video quality deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting compression parameters (quantization parameters, bitrate allocation) based on scene complexity, motion intensity, and device capabilities. This allows the system to optimize the balance between bitstream size and video quality by varying compression strength across different video segments and adapting to specific playback devices.
2Manufacturing precision
If video resolution and quality are increased, then picture quality improves, but bandwidth requirements increase
Solution Approach 1:
The patent implements local quality by applying different compression ratios and quality levels to different regions or segments of the video stream. Complex scenes with high motion receive higher bitrates and less compression, while simpler scenes receive higher compression. This allows high video quality where needed while reducing overall bandwidth consumption.
3Stability of the object's composition
If buffering is increased to handle variable bitrates, then stream stability improves, but delay increases
Solution Approach 1:
The patent applies dynamics by implementing adaptive buffering that dynamically adjusts buffer size and refill rates based on network conditions, playback progress, and video complexity. The buffer management system responds in real-time to changing conditions, reducing buffer size for low-delay requirements while maintaining stability through adaptive bitrate adjustment and predictive pre-buffering strategies.
Data Source
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AI summary
A method of operation of a video coding system includes: receiving a video bitstream as a serial bitstream; extracting a video syntax from the video bitstream; extracting a low delay flag, a network abstraction layer (NAL) hypothetical reference decode (HRD) parameters present flag, and a video coding layer (VCL) HRD parameters present flag from the video syntax extracting a HRD syntax from the video bitstream based on the low delay flag, the NAL HRD parameters present flag, and the VCL HRD parameters present flag; extracting a temporal layer from the video bitstream based on the video syntax having the HRD syntax; and forming a video stream based on the temporal layer for displaying on a device.