Video Signal Transmission Device Using Segmented Compression
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Solution Overview
Problem
Conventional digital triax systems cannot transmit high-definition video signals uncompressed, requiring compression of return and prompter videos at low bit rates, which limits their quality and efficiency.
Innovation Solution
A video signal transmission device that compresses and expands video signals using a camera control device and camera adaptor, synthesizing and encoding them for efficient transmission, and then decodes and separates them to restore original quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If video signals are compressed at low bit rate for transmission through triax cable, then transmission compatibility is improved, but video quality deteriorates
Solution Approach 1:
The patent divides the transmission process into compression at transmission end and decomposition at reception end. The camera control device compresses video signals before transmission, while the camera adaptor decompresses them after reception, allowing high-quality video transmission through triax cable by segmenting the quality preservation function across multiple devices.
Solution Approach 2:
The patent introduces an intermediary processing chain consisting of camera control device for compression and camera adaptor for decomposition. These intermediary devices enable the triax cable to transmit high-definition video by converting the signal format at both ends, effectively mediating between the high-quality source and the limited transmission medium.
2Manufacturing precision
If multiple video signals are transmitted separately, then signal quality is maintained, but device complexity increases
Solution Approach 1:
The patent merges multiple video signals (return video and prompter video) into a single compressed signal for transmission. The camera control device combines these signals and compresses them together, reducing the number of separate transmission channels and simplifying the overall system architecture while maintaining signal quality through coordinated decomposition at the receiver end.
Solution Approach 2:
The patent implements multi-functionality in the camera control device and camera adaptor, which handle both compression and decomposition operations. These universal devices can process multiple video signal types (HD return video, SD prompter video) through a single integrated processing chain, eliminating the need for separate dedicated devices for each signal type.
Data Source
AI summary
In a video signal transmission device, a camera control device includes: a compression unit for compressing a return video signal; a compression/expansion unit for compressing/expanding a prompter video signal; a frame synthesis unit for synthesizing the video signals; an encoding unit for encoding the synthesized video signal; and a modulation unit for modulating the encoded video signal and transmitting the modulated video signal to the camera adaptor. A camera adaptor includes: a demodulation unit for demodulating the video signal from the camera control device; a decoder unit for decoding the demodulated video signal; an expansion unit for separating one video signal from the decoded video signal, expanding the video signal, and restoring the video signal to the return video signal; and an expansion/compression unit for separating one video signal from the decoded video signal, compressing/expanding the video signal, and restoring the video signal to the prompter video signal.