Multimedia Stream Switch Audio Video Multiplexing
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Solution Overview
Problem
Existing multimedia stream switches are limited in that they cannot selectively output audio data from one stream with video data from another stream, requiring the use of costly Phase Locked Loop (PLL) circuitry for audio clock regeneration, which increases design complexity and power consumption.
Innovation Solution
A multimedia stream switch that separates and multiplexes audio and video data from different sources without the need for PLL circuitry, allowing for independent selection and combination of audio and video streams from separate input ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PLL circuitry is used for audio clock regeneration, then audio clock frequency can be accurately regenerated, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts and eliminates the PLL circuitry from the audio clock regeneration process by using alternative timing recovery methods that do not require phase-locked loop hardware, thereby reducing device complexity while maintaining clock frequency accuracy through different technical approaches
Solution Approach 2:
The patent replaces the mechanical/electrical PLL circuit system with a different timing recovery mechanism that uses digital signal processing or alternative clock recovery methods, substituting the traditional PLL approach with a simpler or more efficient system
2Measurement precision
If PLL circuitry is used for audio clock regeneration, then audio clock frequency can be accurately regenerated, but power consumption increases
Solution Approach 1:
The patent removes the power-intensive PLL circuitry from the system by implementing alternative clock recovery methods that consume less power, thereby reducing overall power consumption while maintaining the ability to accurately regenerate audio clock frequencies
3Adaptability or versatility
If traditional stream switching is used, then one multimedia stream can be output at a time, but audio and video selection flexibility is limited
Solution Approach 1:
The patent segments the multimedia stream switching functionality by separating audio stream selection from video stream selection, allowing independent control and switching of audio and video components, thereby increasing adaptability and versatility
Solution Approach 2:
The patent implements dynamic switching capabilities that allow real-time reconfiguration of audio and video stream selections, enabling flexible adaptation to different source combinations without requiring complex predetermined routing configurations
Data Source
AI summary
Embodiments of the invention describe a multimedia stream switch capable of multiplexing the audio and the video data of a multimedia stream separately. The multiplexing features of embodiments of the invention enable a multimedia stream switch to control each multimedia data type separately instead of multiplexing the whole streams (i.e., multiplexing sets of audio/video data together). Furthermore, prior art multimedia stream switches need to regenerate audio clocks by using phase locked loop (PLL) circuitry which incurs manufacturing and development costs. Embodiments of the invention provide the mixing of audio and video data from different sources without the need for PLL circuitry.