Audio Encoding Using Video Scene Analysis
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Solution Overview
Problem
Current audio encoders do not utilize video information to improve audio encoding efficiency and quality, failing to account for scene changes and dialog intensity, which limits their ability to adapt encoding parameters effectively.
Innovation Solution
An audio encoding system that incorporates video information to adjust audio encoding behavior by using a video analyzer/encoder to relay scene change and dialog data to an audio encoder mode selector, which then controls the audio encoding process, including bit-rate allocation and quantization parameters, to optimize encoding based on video content characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If audio encoding is performed without video information assistance, then the audio encoder operates independently and simply, but the audio encoding efficiency and quality cannot be optimized based on video content characteristics
Solution Approach 1:
The patent combines the audio encoder and video encoder into an integrated system where the video encoder detects scene changes and dialog information, then relays this information to the audio encoder. This merging allows the audio encoder to optimize its encoding parameters based on video content characteristics, improving audio encoding efficiency while maintaining system integration.
Solution Approach 2:
The system implements a feedback mechanism where the video encoder analyzes video frames to detect scene changes and dialog presence, then feeds this information back to the audio encoder. The audio encoder uses this feedback to dynamically adjust its encoding mode and parameters, enabling adaptive optimization of audio quality and compression efficiency.
2Manufacturing precision
If audio encoding parameters are fixed without adaptation, then the encoder operates simply, but the audio quality varies poorly across different video scenes and dialog intensities
Solution Approach 1:
The patent implements dynamic encoding parameters that adapt in real-time based on video content. The system detects scene changes and dialog intensity from video frames, then dynamically adjusts audio encoding parameters such as bit-rate allocation and quantization precision. This allows the audio encoder to maintain high quality for dialog-intensive scenes while using more aggressive compression for music-heavy or quiet scenes.
Solution Approach 2:
The system changes encoding parameters based on video content analysis. When dialog is detected in video frames, the audio encoder increases precision for frequency ranges relevant to human speech. When scene changes occur, the encoder adjusts parameters to match the new audio characteristics. This parameter adaptation ensures consistent audio quality across diverse video content types.
3Manufacturing precision
If video information is integrated into audio encoding, then encoding efficiency and quality improve, but the system complexity and processing overhead increase
Solution Approach 1:
The system extracts only the essential video information needed for audio encoding optimization - specifically scene change detection and dialog presence indicators. Rather than processing all video data, the system extracts key features that directly impact audio encoding decisions, reducing the complexity overhead while maintaining the benefits of video-informed audio encoding.
Solution Approach 2:
The patent introduces an intermediary component that bridges the video encoder and audio encoder. This intermediary analyzes video frames to detect scene changes and dialog, then translates this information into control signals for the audio encoder. The intermediary acts as a mediator that simplifies the integration process and reduces direct system complexity while enabling intelligent adaptive encoding.
Data Source
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AI summary
Various audio encoders and methods of using the same are disclosed. In one aspect, an apparatus is provided that includes an audio encoder (80) and an audio encoder mode selector (60). The audio encoder mode selector is operable to analyze video data and adjust an encoding mode of the audio encoder based on the analyzed video data.