HDR Video Stream Metadata for SDR and HDR Receiver Compatibility
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Solution Overview
Problem
Conventional receivers and HDR-compatible receivers face challenges in accurately performing electro-optical conversion processing on transmission video data obtained using high dynamic range opto-electronic transfer characteristics, as they need to distinguish between standard and high dynamic range characteristics for proper video display.
Innovation Solution
A transmission apparatus that includes an opto-electronic conversion unit for high dynamic range video data, an encoding unit for video stream generation, a transmission unit for container formatting, and an information insertion unit for embedding metadata indicating standard and high dynamic range opto-electronic transfer characteristics into the video stream or container layers, allowing both types of receivers to perform appropriate electro-optical conversions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If HDR opto-electronic transfer characteristic is used for transmission video data, then HDR-compatible receivers can achieve high dynamic range display, but conventional receivers cannot properly interpret the transfer characteristic
Solution Approach 1:
The transmission apparatus performs preliminary action by inserting metadata information indicating the HDR opto-electronic transfer characteristic into the video stream or container before transmission. This allows receivers to identify and properly process the HDR transfer characteristic without losing information about the intended display format.
Solution Approach 2:
Metadata information acts as an intermediary between the HDR opto-electronic transfer characteristic and receivers. The metadata enables conventional receivers to identify when HDR processing should not be applied, while allowing HDR-capable receivers to properly interpret and apply the HDR transfer characteristic.
2Measurement precision
If metadata information indicating HDR opto-electronic transfer characteristic is inserted, then HDR-compatible receivers can identify HDR content, but the system complexity increases due to dual metadata insertion requirements
Solution Approach 1:
The metadata insertion is segmented into two distinct locations: the video stream layer and the container layer. This segmentation allows the system to insert metadata at appropriate levels without creating a single complex insertion mechanism, enabling precise identification while distributing the complexity across multiple manageable points.
3Adaptability or versatility
If conventional receiver determines opto-electronic transfer characteristic compatibility, then backward compatibility is maintained, but the receiver must accurately distinguish between SDR and HDR characteristics
Solution Approach 1:
Metadata information serves as an intermediary that clearly distinguishes between SDR and HDR opto-electronic transfer characteristics. Conventional receivers can detect the metadata and determine compatibility without difficulty, as the metadata explicitly indicates whether HDR processing should be applied, eliminating the need for complex analysis of the transfer characteristic itself.
Data Source
AI summary
Both a conventional receiver and an HDR-compatible receiver well perform electro-optical conversion processing on transmission video data obtained by using an HDR opto-electronic transfer characteristic. High dynamic range opto-electronic conversion is performed on high dynamic range video data to obtain the transmission video data. Encoding processing is performed on this transmission video data to obtain a video stream. A container of a predetermined format including this video stream is transmitted. Metadata information indicating a standard dynamic range opto-electronic transfer characteristic is inserted into a layer of the video stream, and metadata information indicating a high dynamic range opto-electronic transfer characteristic is inserted into at least one of the layer of the video stream and a layer of the container.