Audio Decoder Extracting System Data via HDMI
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Solution Overview
Problem
High-definition multimedia interface (HDMI) does not provide an interface for transmitting system data, limiting the ability of TVs to receive and process system data necessary for bidirectional broadcasting services when retransmitting terrestrial broadcasts.
Innovation Solution
A method and apparatus for decoding audio bitstreams that include system data, using an MPEG-H 3D audio stream to transmit system data through HDMI by extracting and transmitting system metadata, such as engine type and data length, to a system engine, allowing TVs to function as a medium for bidirectional broadcasting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HDMI interface is used for transmitting audio and video data, then digital content transmission quality is maintained without deterioration, but system data cannot be transmitted to the TV
Solution Approach 1:
The audio bitstream is designed to carry multiple types of data simultaneously - both audio content and system data (such as EPG information, service control data). The HDMI interface thus serves multiple functions: transmitting high-quality audio/video while also conveying system data through the audio channel, enabling the TV to function as an independent bidirectional broadcasting medium without requiring additional interfaces or hardware modifications
2Productivity
If terrestrial broadcast is retransmitted through a set-top box, then broadcast service is provided to users, but the TV cannot function alone for bidirectional broadcasting
Solution Approach 1:
System data is extracted from the audio bitstream and transmitted through the HDMI interface to the TV. This allows the TV to receive and process system data independently, enabling bidirectional broadcasting services without requiring a set-top box. The TV can thus function as a standalone medium for both receiving and interacting with broadcast services
Data Source
AI summary
Provided are an apparatus and method for decoding audio, The method includes receiving a bitstream consisting of audio packets; decoding an audio packet included in the received bitstream, extracting a type of the decoded packet; obtaining system data from a packet of which system metadata corresponds to the extracted packet type; and transmitting the obtained system data to a system engine, wherein the system data includes at least one of information regarding a type of the system engine and a length of the system data.