Multi-Standard Audio Detection Using Carrier Energy Analysis
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Solution Overview
Problem
Current TV signal receiving apparatuses require dedicated circuit designs for each audio broadcasting standard, limiting their functionality to specific regions and necessitating multiple chip designs, which complicates development and maintenance.
Innovation Solution
An audio multi-standard detection apparatus and method that pre-records carrier bands for various audio broadcasting formats, using a carrier calculation unit and switch controller to identify the appropriate format by comparing the received signal with pre-recorded bands, allowing a single decoding chip to adapt to different broadcasting systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated circuit designs are employed for each audio broadcasting standard, then decoding accuracy and reliability are improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The patent implements a universal audio decoding chip that can handle multiple broadcasting standards (A2, EIAJ, BTSC, NICAM) through a single integrated design. The chip uses automatic standard detection and parameter adjustment mechanisms to adapt to different audio formats, eliminating the need for separate dedicated circuits for each standard while maintaining decoding accuracy across all formats.
Solution Approach 2:
The invention dynamically adjusts decoding parameters based on the detected broadcasting standard. The system automatically identifies the audio standard and modifies internal parameters such as carrier frequency, modulation type, and decoding algorithms to match the specific requirements of each format, enabling a single chip to perform optimally across diverse standards.
2Reliability
If dedicated circuit designs are employed for each audio broadcasting standard, then regional compatibility is improved, but adaptability to different countries and regions deteriorates
Solution Approach 1:
The audio decoding chip is designed as a universal platform capable of operating in all major broadcasting regions. By integrating support for A2 (used in Europe and China), EIAJ (Japan), BTSC (US and Taiwan), and NICAM standards into a single chip, the system achieves both regional compatibility and global adaptability without requiring separate regional versions.
Solution Approach 2:
The system employs dynamic configuration capabilities that allow the chip to adapt its operating parameters in real-time based on the detected broadcasting standard. This dynamic adaptation enables the same hardware to seamlessly switch between different regional standards, providing both localized compatibility and broad international versatility.
3Reliability
If multiple chip designs are created for different broadcasting standards, then decoding performance for each standard is optimized, but development burden and maintenance difficulty increase
Solution Approach 1:
The patent consolidates the functionality of multiple standard-specific chips into a single integrated audio decoding chip. By merging support for A2, EIAJ, BTSC, and NICAM standards into one unified design, the system maintains optimized decoding performance for each standard while significantly reducing the development burden, manufacturing complexity, and maintenance requirements associated with managing multiple separate chip designs.
4Reliability
If multiple chip designs are created for different broadcasting standards, then regional functionality is ensured, but product flexibility and efficiency deteriorate
Solution Approach 1:
The universal audio decoding chip provides both regional functionality and product flexibility by integrating support for multiple broadcasting standards into a single platform. The chip can be deployed globally without modification, maintaining optimized performance for each regional standard while enabling manufacturers to produce a single product line that serves multiple markets, thereby enhancing both flexibility and efficiency.
Data Source
AI summary
An audio multi-standard detection apparatus is provided to pre-record a plurality of audio broadcasting format carrier bands. The detection apparatus includes: a carrier calculation unit and a switch controller. The carrier calculation unit is used for receiving an intermediate frequency signal and calculates the first carrier energy of the intermediate frequency signal in each of the frequency bands. From this first carrier energy, the switch controller determines which frequency bands are existed in the intermediate frequency signal, then analyzes the signal via at least one threshold value to determine the frequency band's primary carrier. The switch controller obtains an effective carrier. Further, the switch controller compares the effective carrier with the pre-recorded carrier bands for selectively outputting the appropriate audio broadcasting format. Hence, the present invention achieves the objective of determining the appropriate audio multi-standard and enables the support of broadcast systems in various countries with a single audio decoding chip.