AV Transmission Format Adaptation for Multi-Sink Compatibility
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Solution Overview
Problem
In AV systems, content data transmission from a source device to multiple sink devices is hindered when the video and audio formats are incompatible, leading to unsuccessful reproduction in some devices.
Innovation Solution
A transmission device with a communication unit and a format determining unit that acquires compatible data format information from reception devices, determines a common data format, and optionally converts the content data to ensure compatibility, using either a single or dual band communication, allowing for successful broadcast transmission across multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If content data is broadcast in a specific video format and audio format, then some sink devices can reproduce the content, but other sink devices with different compatible formats cannot reproduce the content
Solution Approach 1:
The transmission device dynamically changes the video format and audio format parameters of the content data based on the detected compatible formats of sink devices. The format determining unit selects appropriate format parameters from a list of compatible formats and adjusts the encoding parameters accordingly to ensure compatibility with the target sink devices.
Solution Approach 2:
The system dynamically determines the transmission format based on real-time detection of sink device capabilities. Instead of using a fixed format, the transmission device adapts its output format dynamically according to the detected compatible formats, allowing flexible adjustment of video and audio parameters for different sink devices.
2Device complexity
If the transmission device uses a single data format for broadcast, then the transmission process is simple, but compatibility with all sink devices cannot be ensured
Solution Approach 1:
The transmission device performs preliminary detection of sink device compatible formats before actual content transmission. The format detecting unit pre-identifies the list of compatible formats and stores them for reference, so that when content needs to be transmitted, the appropriate format can be selected without complex real-time calculations.
Solution Approach 2:
The format determining unit acts as an intermediary between the content source and sink devices. It receives content data, determines the appropriate format based on detected capabilities, and transforms the content into the suitable format before transmission, thereby mediating the compatibility issue without requiring complex direct interactions with each sink device.
3Adaptability or versatility
If the transmission device detects and adapts to compatible formats of multiple sink devices, then broadcast compatibility is improved, but the format determination process becomes more complex
Solution Approach 1:
The system creates a copy of the compatible format information from sink devices and stores it in a manageable structure. The format detecting unit copies the essential format parameters from detected sink devices and maintains a list of compatible formats, which simplifies the determination process by working with replicated information rather than complex real-time analysis.
Solution Approach 2:
The format determination process is segmented into distinct functional units: format detection, format determination, and content transformation. Each unit handles a specific aspect of format management independently, making the overall complex process more manageable and modular.
Data Source
AI summary
To allow a broadcast transmission to be preformed successfully.A source device 10 reads out EDID from EDID ROMs 30a-1 to 30a-N of sink devices 30-1 to 30-N, respectively, by using information transmitting and receiving function. The source device 10 determines a transmission data format in an AV stream so as to be compatible with all of the sink devices 30-1 to 30-N, based on data format information in the EDID. The source device 10 broadcasts the AV stream based on the transmission data format determined as described above to the sink devices 30-1 to 30-N. The sink devices 30-1 to 30-N receive the AV stream broadcast from the source device 10. Since the transmission data format of the AV stream is compatible with all of the sink devices 30-1 to 30-N, all of the sink devices 30-1 to 30-N can successfully reproduce the received AV stream.