DSD Sample Extraction and Filtering for PCM Distribution
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Solution Overview
Problem
Current music distribution systems require multiple data types for PCM and DSD signals, increasing resource utilization and complexity, whereas it is desirable to handle PCM signals using a single DSD signal for efficient distribution.
Innovation Solution
A signal processing apparatus and method that extracts a predetermined number of samples from a DSD signal at a specific interval to generate a PCM signal with a predetermined sampling frequency, using an extraction and filtering section, allowing for the conversion of DSD signals into PCM signals for efficient distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple data types (PCM and DSD signals) are prepared for distribution, then compatibility with different playback devices is improved, but resource utilization deteriorates and system complexity increases
Solution Approach 1:
The distribution system stores only DSD signals in a universal format that can serve both DSD-capable and PCM-only playback devices. The system universally handles all distribution requests using a single data type, eliminating the need for separate PCM and DSD signal preparations while maintaining compatibility across different device types.
Solution Approach 2:
Instead of converting DSD to PCM for PCM-only devices (traditional approach), the system inverts the approach by having PCM-only devices perform the conversion from DSD to PCM locally. This reverses the conversion direction and eliminates the need for the distribution system to maintain multiple data types.
2Adaptability or versatility
If multiple data types (PCM and DSD signals) are prepared for distribution, then compatibility with different playback devices is improved, but resource utilization deteriorates
Solution Approach 1:
The distribution system stores only DSD signals in a universal format that can serve both DSD-capable and PCM-only playback devices. The system universally handles all distribution requests using a single data type, eliminating the need for separate PCM and DSD signal preparations while maintaining compatibility across different device types.
3Measurement precision
If DSD signal sampling frequency is increased for higher quality, then sound quality is improved, but communication capacity requirement deteriorates
Solution Approach 1:
The system performs preliminary downsampling of high-resolution DSD signals to lower sampling frequencies during the distribution preparation phase. By pre-processing the signals to reduce their communication requirements while maintaining quality, the system enables efficient streaming without requiring excessive communication bandwidth.
Data Source
AI summary
The present technology relates to a signal processing apparatus, a signal processing method, and a program that make it possible to cope with an output of a PCM signal using one DSD signal. A distribution apparatus includes an extraction section that, in a case where a PCM signal having a predetermined sampling frequency is generated from a DSD signal, extracts a predetermined number of samples from the DSD signal around samples at a predetermined interval determined by the predetermined sampling frequency, and a filtering section that generates the PCM signal having the predetermined sampling frequency by filtering the extracted predetermined number of samples. The present technology is applicable to, for example, a distribution apparatus, etc., that distributes the PCM signal to a client apparatus.