Audio Video Coaxial Transmission FIFO Buffering
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Solution Overview
Problem
Current methods for transmitting analog audio and video data over a single coaxial cable are complex and require intensive calculations, particularly in interleaving audio data with video data, leading to burdensome buffering and storage requirements.
Innovation Solution
A method that involves quantizing audio data and inserting it into the video blanking period of an analog video signal without calculating audio duration on a row-by-row basis, using a First-in-First-Out (FIFO) buffer to store and serialize audio data, and multiplexing it with video data to create a combined audio and video signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If audio data is interleaved with video data using current signaling protocols, then audio and video can be transmitted over a single coaxial cable, but intensive calculation and complex coding schemes are required
Solution Approach 1:
The patent segments the transmission process by separating audio data insertion from video data processing. Audio data is placed in dedicated time slots (vertical and horizontal blanking intervals) without requiring complex interleaving calculations. This segmentation eliminates the need for intensive calculation while maintaining single-cable transmission capability.
Solution Approach 2:
The patent uses preliminary action by pre-defining fixed time slots for audio data transmission within the video signal structure. The vertical blanking interval and horizontal blanking interval are predetermined locations where audio data can be inserted without real-time calculation, simplifying the coding scheme while enabling combined transmission.
2Measurement precision
If audio duration is calculated on a row-by-row basis, then accurate audio-video synchronization is achieved, but burdensome buffering and storage requirements are created
Solution Approach 1:
The patent applies preliminary action by pre-allocating fixed time slots for audio data in the vertical and horizontal blanking intervals. This eliminates the need for real-time audio duration calculation on a row-by-row basis, thereby reducing buffering and storage requirements while maintaining synchronization through predetermined time slot placement.
Solution Approach 2:
The patent changes the parameter of audio data placement from dynamic calculation-based to fixed time-slot-based. By transforming the insertion method to use predetermined intervals (vertical blanking interval, horizontal blanking interval), the system achieves synchronization without requiring extensive buffering and storage of audio duration information.
3Adaptability or versatility
If complex interleaving calculations are performed, then audio data can be integrated with video data, but operating power requirements increase
Solution Approach 1:
The patent segments the integration process by placing audio data in predetermined blanking intervals rather than performing complex interleaving calculations. This segmentation approach integrates audio with video transmission while minimizing computational power requirements, as no real-time calculation is needed.
Solution Approach 2:
The patent uses preliminary action by establishing fixed time slots for audio data in advance (vertical blanking interval, horizontal blanking interval). This pre-defined structure eliminates the need for intensive real-time calculations, thereby reducing operating power requirements while achieving audio-video integration.
Data Source
AI summary
Disclosure herein includes descriptions of a method for transmission of digital audio over analog video data with a single cable. The method comprising receiving, by a video transmitter, a digital video signal and one of a digital or an analog audio signal. Sampling, by an audio analog-to-digital converter (ADC), the audio signal if it is an analog audio signal. Storing, in a First-in-First-Out (FIFO) buffer, digital audio data corresponding to the sampled analog audio signal; reading, by an arbiter, the digitized audio samples, in response detecting an availability of data in the FIFO buffer and formatting the serialized audio bits with a digital start code; inserting the serialized audio bits and the digital start code into a blanking period of the digital video signal, thereby generating a combined digital audio and video signal and converting, by a digital-to-analog converter (DAC), the combined digital audio and video signal to analog, thereby generating a combined analog audio and video stream including audio data in a native form; and transmitting the combined analog audio and video stream to a receiver in one direction. In another embodiment, an analog signal is transmitted in the opposite direction.