Analog Video Stream Audio Metadata Embedding
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Solution Overview
Problem
Current television broadcasting systems are limited in transmitting non-conventional data types, such as multiple digital audio channels and metadata, alongside conventional audio-visual content, and are not robust enough to withstand video compression and digital-to-analog conversions, hindering interactive applications like online gaming and distance-learning.
Innovation Solution
A method for multiplexing multiple video streams and embedding multiple encoded digital audio channels, along with tutorials and metadata, into a single analog video channel, using techniques like temporal and spatial multiplexing, and embedding audio metadata in the form of symbols within video pixels, followed by detection and extraction using a matched filter, to achieve high-quality audio-video output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple digital audio channels and metadata are embedded in analog video stream, then data transmission capability is improved, but signal robustness during compression and conversion deteriorates
Solution Approach 1:
The patent segments the embedding process into distinct phases: audio data is first encoded into symbolic representations, then embedded in the analog video domain, and finally extracted and decoded at the receiver. This segmentation allows each phase to be optimized independently, maintaining robustness while enabling multiple data types.
Solution Approach 2:
The patent introduces an intermediary symbolic representation layer between the digital audio data and the analog video domain. Audio data is converted to symbols that can be embedded in video pixels, acting as a mediator that enables transmission while protecting the original data through the conversion process.
2Productivity
If multiple tutorials and audio channels are multiplexed in single channel, then bandwidth efficiency is improved, but system complexity increases
Solution Approach 1:
The patent merges multiple tutorials and audio channels into a single analog video channel by multiplexing their symbolic representations across video pixels. This combining approach achieves bandwidth efficiency by transmitting multiple data streams through one channel while using systematic embedding patterns to manage complexity.
Solution Approach 2:
The patent transitions data from the digital domain to the analog video domain, utilizing the spatial and temporal dimensions of video pixels for data embedding. This dimensional change allows multiple data streams to be multiplexed by distributing symbols across different video frames and pixel positions.
3Adaptability or versatility
If audio metadata is embedded in video pixels, then transmission capability is improved, but video quality may deteriorate
Solution Approach 1:
The patent applies local quality by embedding audio symbols in specific video pixels that are less critical to visual perception. By selectively choosing embedding locations based on their impact on video quality, the system maintains acceptable visual fidelity while enabling data transmission.
Solution Approach 2:
The patent changes the state of selected video pixels by embedding audio symbols in their color or intensity values. This parameter modification allows data embedding while attempting to minimize visual impact by choosing parameters that are less sensitive to human perception.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the simultaneous broadcasting of multiple tutorials and digital audio channels in a single analog channel, providing a robust method that sustains video compression and digital-to-analog conversions, enhancing user experience and bandwidth efficiency.
Implementation Method 1
The audio pilot symbol is then detected in the multiplexed video pixels at a receiver by matching the stored threshold auto-correlated value of the audio pilot symbol using a matched filter
Data Source
AI summary
A method for embedding, multiplexing and broadcasting of multiple audio metadata in an analog video stream and thereby generating output analog video containing multiple separable audio-video tuples of optimum quality. Further, a user study is performed on a sample tutorial video for various frame rates and resolution to calculate the mean opinion score for deriving the degree of multiplexing that may be provided without deteriorating the quality of video.