HDMI Content Identification via AVI InfoFrames
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
HDMI communication systems lack the ability to optimally process various content types such as still pictures, text, cinema, and games, as they are primarily designed for dynamic picture content, leading to suboptimal display and processing of different image types.
Innovation Solution
Incorporating content identification information into the blanking period of image signals transmitted via HDMI, allowing the reception side to identify the content type and adjust processing accordingly, including inserting content identification information using AVI InfoFrames or SPD InfoFrames, and varying color space and quantization range definitions based on content type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If HDMI transmits image data primarily designed for dynamic picture content, then high-speed digital image signal transmission is achieved, but optimal processing for various content types (still pictures, text, cinema, games) cannot be performed
Solution Approach 1:
The system performs preliminary classification of image data into different content types (still picture, text, cinema, game, dynamic picture) before transmission. Content type identification information is inserted into the transmitted signal in advance, enabling the reception apparatus to prepare appropriate processing parameters beforehand, thus achieving optimal processing for each content type without losing content type information
Solution Approach 2:
An intermediary mechanism is introduced in the form of content type identification information that bridges the transmitter and receiver. This intermediary carries classification data (still picture, text, cinema, game, or dynamic picture) through the transmission channel, allowing the reception apparatus to adapt its processing without requiring complex communication protocols or losing content type information
2Manufacturing precision
If standard HDMI processing is applied to all image data, then simple universal processing is maintained, but suboptimal display results occur for specific content types
Solution Approach 1:
The system applies local quality by setting different processing parameters for different content types. Based on the content type identification information, the reception apparatus selectively adjusts color space conversion parameters, quantization ranges, and other processing characteristics specific to each content type (still picture, text, cinema, game, or dynamic picture), thereby achieving high display processing precision without requiring complex manual configuration
Solution Approach 2:
The invention utilizes parameter changes by dynamically adjusting processing parameters based on content type. The reception apparatus changes color space definitions, quantization ranges, and other processing parameters according to the identified content type, enabling optimal display processing for each content type while maintaining simple automatic control through standardized HDMI protocols
Data Source
AI summary
An AV system composed of an HD recorder and a display unit uses a communication interface of the HDMI. An HDMI source of the HD recorder transmits image data (image signal) in the form of differential signals to an HDMI sink of the display unit through three TMDS channels. The HDMI source inserts content identification information for the identification of the type of a content of image data to be transmitted into an AVI InfoFrame packet placed in a blanking period. A control section of the display unit controls operation of a display processing section which carries out a process for displaying for the image data based on the content identification information received by the HDMI sink and a display section for displaying an image.