Bidirectional Audio Video Transmission via Multi-Lane Cable
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Solution Overview
Problem
Conventional multimedia electronic devices face challenges in bidirectional audio/video signal transmission, particularly in split-type television systems where the display and host systems are separated, limiting functionality and service life.
Innovation Solution
A transmission system and method that enables bidirectional audio/video signal transmission between peer devices using a first and second transmission apparatus connected through a cable with multiple lanes, employing encapsulation, multiplexing, and demultiplexing to manage the signal flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a conventional integrated television structure is used, then the structure is simple, but the service life is limited and functionality cannot be improved
Solution Approach 1:
The television system is divided into separate modules: a host system containing processing components and a display system containing the screen and camera. This segmentation allows independent replacement and upgrading of components, extending the overall service life while maintaining a relatively simple initial structure.
Solution Approach 2:
The host system is designed as a universal platform that can connect to different display devices and support various functions including video playback, camera input, and external device connectivity. This multi-functionality allows the system to adapt to different configurations without requiring complete redesign.
2Adaptability or versatility
If bidirectional transmission is implemented, then functionality is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple transmission functions (video output, video input, audio transmission) into a single HDMI interface connection. The host system and display system share common protocol stacks and processing architectures, reducing the need for separate dedicated circuits for each function and thereby managing complexity while enabling bidirectional transmission.
Solution Approach 2:
The patent introduces intermediary components such as video encoders/decoders and protocol adapters that facilitate bidirectional communication. These intermediaries handle the complexity of signal conversion and protocol management, allowing the main system components to communicate through standardized interfaces without direct complex interactions.
3Manufacturing precision
If video encoding/decoding is performed, then signal quality is improved, but transmission efficiency decreases
Solution Approach 1:
The patent applies video encoding/decoding selectively rather than universally. For example, when the display system captures video through its camera, the video may be transmitted in a compressed format without full encoding/decoding cycles, reducing processing overhead while maintaining acceptable quality for specific use cases.
Solution Approach 2:
The system dynamically adjusts encoding parameters such as bitrate, resolution, and compression level based on the transmission direction, content type, and available bandwidth. This allows the system to optimize between quality and efficiency for different scenarios, performing full encoding only when necessary for quality-critical paths.
Data Source
AI summary
A transmission method, apparatus, and system implement bidirectional transmission of an audio/video signal between peer devices. The transmission system may include a first transmission apparatus and a second transmission apparatus, where the first transmission apparatus is connected to the second transmission apparatus through a first cable, and the first cable includes a first number of main downlink lanes and a second number of main uplink lanes. Bidirectional transmission of the audio/video signal between the first transmission apparatus and the second transmission apparatus is performed through the first cable.