Invention Grant
- Patent Title: Simultaneous time-domain and frequency-domain noise shaping for TDAC transforms
- Patent Title (中): TDAC变换的同时时域和频域噪声整形
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Application No.: US12905750Application Date: 2010-10-15
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Publication No.: US08626517B2Publication Date: 2014-01-07
- Inventor: Bruno Bessette
- Applicant: Bruno Bessette
- Applicant Address: CA Town of Mount Royal, Quebec
- Assignee: Voiceage Corporation
- Current Assignee: Voiceage Corporation
- Current Assignee Address: CA Town of Mount Royal, Quebec
- Agency: K&L Gates LLP
- Main IPC: G10L19/08
- IPC: G10L19/08 ; G10L19/12

Abstract:
A frequency-domain noise shaping method and device interpolates a spectral shape and a time-domain envelope of a quantization noise in a windowed and transform-coded audio signal. In the method and device, transform coefficients of the windowed and transform-coded audio signal are split into a plurality of spectral bands. For each spectral band, a first gain representing a spectral shape of the quantization noise at a first transition between a first time window and a second time window is calculated, a second gain representing a spectral shape of the quantization noise at a second transition between the second time window and a third time window is calculated, and the transform coefficients of the second time window are filtered based on the first and second gains, to interpolate between the first and second transitions the spectral shape and the time-domain envelope of the quantization noise.
Public/Granted literature
- US20110145003A1 Simultaneous Time-Domain and Frequency-Domain Noise Shaping for TDAC Transforms Public/Granted day:2011-06-16
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