Improved M/S Stereo Encoder and Decoder

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention is an improved method and system for encoding and decoding stereo audio signals. It applies spectral whitening to both separate-channel and mid-side representations of the audio, then dynamically selects which version to encode, enhancing the overall audio quality and compression efficiency.

Use CasesContent extracted from patent full text and abstract with AI.

• Music streaming services seeking high-quality, compressed stereo audio
• Audio/video conferencing software for clearer transmission with less bandwidth
• Storage and playback of stereo audio files (e.g., MP3, AAC)
• Broadcasting (radio/TV) where bandwidth efficiency is important
• Hearing aids or other assistive listening devices to improve audio perception

BenefitsContent extracted from patent full text and abstract with AI.

• Improves audio quality during compression and transmission
• Reduces file sizes or required bandwidth without significant loss of audio fidelity
• Provides flexibility by choosing the best encoding method for each audio segment
• Enhances listening experience across a wide range of playback devices
• Can be integrated into existing audio encoding/decoding frameworks

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention refers to audio encoders, audio decoders, and audio encoding methods and audio decoding methods. In some examples, the invention refers to improved stereo coding. An encoder provides an encoded representation of an audio signal. The encoder applies a spectral whitening to a separate-channel representation of the input audio signal, to obtain a whitened separate-channel representation of the signal. The audio encoder applies a spectral whitening to a mid-side representation of the signal, to obtain a whitened mid-side representation of the signal. The audio encoder decides whether to encode the whitened separate-channel representation of the signal, to obtain the encoded representation of the signal, or to encode the whitened mid-side representation of the signal, to obtain the encoded representation of the signal.