Flexible Multiplexer Mixer for Multi-Channel Audio Processing
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Solution Overview
Problem
Existing audio decoding systems for Blu-ray and HD-DVD technologies lack architectural flexibility and efficiency in handling multi-channel audio formats, particularly in supporting high-quality sample rate conversion, channel mixing, and metadata synchronization, which is essential for advanced audio playback and storage requirements.
Innovation Solution
A flexible multiplexer and mixer (FMM) system that integrates a processor, decode DSP, and memory to mix primary and secondary audio information based on metadata, supporting up to 7.1 channels with dynamic coefficient updates and high-quality sample rate conversion, enabling efficient playback and encoding of various audio formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional audio decoding systems are used for Blu-ray and HD-DVD, then basic audio playback is supported, but architectural flexibility and efficiency for handling multi-channel audio formats is insufficient
Solution Approach 1:
The system employs dynamic element enablement where processing elements can be selectively activated or deactivated based on the specific audio format being decoded. This allows the architecture to adapt flexibly between different multi-channel formats (5.1, 7.1, etc.) without requiring a completely fixed complex structure for all possible scenarios.
Solution Approach 2:
The decoding system is designed with universal processing elements that can handle multiple audio formats and channel configurations through configurable routing and processing paths. A single system architecture serves multiple functions by dynamically reconfiguring how processing elements are connected and activated.
2Manufacturing precision
If high-quality sample rate conversion and channel mixing are implemented, then advanced audio format support is improved, but processing complexity increases
Solution Approach 1:
The audio processing pipeline is segmented into distinct functional stages: sample rate conversion, channel mixing, and metadata synchronization. Each stage is handled by dedicated processing elements that can be independently configured and optimized, reducing overall processing complexity while maintaining high quality output.
Solution Approach 2:
Sample rate conversion is performed as a preliminary action before channel mixing and other processing steps. By converting sample rates early in the processing chain, subsequent operations work with uniformly sampled data, simplifying the complexity of later processing stages while ensuring high-quality conversion.
3Measurement precision
If metadata synchronization is added for primary and secondary audio information, then audio format accuracy is improved, but system complexity increases
Solution Approach 1:
Metadata acts as an intermediary that carries synchronization information between primary and secondary audio streams. Rather than implementing complex direct synchronization mechanisms, the system uses metadata packets to convey timing and channel assignment information, simplifying the synchronization architecture while improving accuracy.
Data Source
AI summary
Certain aspects of a method and system for a flexible multiplexer and mixer (FMM) are disclosed. Aspects of one method may include mixing primary audio information and secondary audio information of sampled received audio data based on corresponding metadata information to generate mixed output audio data. The generated mixed output audio data may be pulled through a plurality of pipeline stages.