Clock-Recovered Audio Transmission Without a Dedicated Clock Line
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Solution Overview
Problem
Existing technologies face challenges in enabling high quality audio reproduction on the reception side without supplying the transmission clock using a clock signal line from the reception side to the transmission side.
Innovation Solution
A transmission apparatus that includes an encoded data reception unit to receive encoded data capable of clock recovery, an audio clock generator to generate an audio clock based on a carrier clock recovered from the encoded data, and an audio data transmission unit to transmit audio data in synchronization with the generated audio clock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a clock signal line is used to supply transmission clock from reception side to transmission side, then high quality audio reproduction is enabled, but device complexity and connection requirements increase
Solution Approach 1:
The patent extracts the clock signal transmission function from a dedicated clock signal line and integrates it into the existing audio data transmission channel. By embedding clock information within the audio data stream itself, the system eliminates the need for separate clock wiring while maintaining synchronization capability for high quality audio reproduction
Solution Approach 2:
The audio data transmission channel is designed to serve multiple functions: transmitting both audio data and clock synchronization signals through the same physical medium. This multi-functional approach reduces connection complexity while preserving the ability to achieve high quality audio reproduction through proper clock recovery
2Reliability
If a dedicated clock signal line is implemented, then transmission synchronization is improved, but the number of required physical connections increases
Solution Approach 1:
The patent merges the clock signal transmission function with the audio data transmission function into a single integrated channel. By combining these two functions that were previously separated into different physical connections, the system maintains reliable transmission synchronization while reducing the total number of physical connections required
3Device complexity
If clock recovery is performed from encoded data, then device complexity is reduced, but measurement precision of clock timing may be affected
Solution Approach 1:
The patent introduces an intermediary encoding scheme that embeds clock timing information within the audio data stream. This intermediary representation allows the receiver to recover the carrier clock with sufficient precision for high quality audio reproduction, while eliminating the need for a dedicated clock signal line and reducing overall device complexity
Data Source
AI summary
This technology is to enable high quality audio reproduction on the reception side without supplying a transmission clock using a clock signal line from the reception side to the transmission side. The transmission apparatus receives encoded data capable of clock recovery from a reception apparatus (external device), generates an audio clock on the basis of a carrier clock recovered from the encoded data, and transmits audio data to the reception apparatus in synchronization with the audio clock. The reception apparatus transmits the encoded data capable of clock recovery to the external device in synchronization with the carrier clock generated on the basis of an self-generating audio clock, receives the audio data from the transmission apparatus (external device), and processes the audio data on the basis of the self-generating audio clock.