Audio Disk Zone Segmentation for Lossless and Lossy Compression
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Solution Overview
Problem
Conventional DVD-Video disks face limitations in recording and reproducing audio data independently of video signals, with restricted capacity, inability to manage audio time effectively, and lack of support for high-grade lossless compression and various compression types, making them unsuitable for users who want to record and play back audio data simply and efficiently.
Innovation Solution
The proposed solution involves an audio disk format with separate zones for linear PCM and lossy compressed audio data, allowing for independent management and reproduction of audio tracks using DVD-Audio specifications, along with text information and multiple compression techniques, enabling efficient recording and playback on portable devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If audio data is recorded in high-grade lossless compression format, then audio quality is improved, but recording capacity is reduced
Solution Approach 1:
The disk is divided into multiple zones with different compression formats. The first zone stores lossless compressed audio data for high quality requirements, while the second zone stores lossy compressed audio data for higher capacity utilization. This segmentation allows the system to provide both high-grade audio quality and extended recording capacity by selecting appropriate zones based on user needs.
2Adaptability or versatility
If multiple compression types are supported, then versatility is improved, but device complexity is increased
Solution Approach 1:
Audio data is pre-processed and encoded in multiple compression formats (lossless and lossy) during the recording phase. The system prepares various compression versions in advance and stores them in different zones, allowing portable devices to directly play back compatible formats without requiring complex real-time transcoding operations.
3Ease of operation
If audio data is recorded independently from video signal, then ease of operation is improved, but device complexity is increased
Solution Approach 1:
The patent introduces a new organizational dimension by creating separate audio zones independent of the traditional video-based DVD structure. Audio data is organized in dedicated zones (first audio zone for lossless, second audio zone for lossy) with their own management systems, allowing audio to be recorded and reproduced independently from video signals while maintaining a structured disk format.
Data Source
AI summary
An audio disk has a first audio zone and a second audio zone. In the first audio zone, both of a plurality of tracks each including a single piece of music and a first management information including first control information for allowing each track to be reproduced are recorded. The music is composed of audio data produced from either a linear PCM signal or a signal produced by applying lossless compression to the linear PCM signal. In the second audio zone, music composed of audio signal produced under lossy compression, a plurality of files each storing a signal of a single piece of music subjected to the lossy compression, and second management information including second control information for allowing each file to be reproduced are recorded. Each piece of music stored in each file corresponds to the music included in any one of the tracks in the first audio zone.