METHOD AND APPARATUS FOR PREDICTIVELY QUANTIZING VOICED SPEECH

• US 20080312917A1
• Filed: 08/12/2008
• Published: 12/18/2008
• Est. Priority Date: 04/24/2000
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Manjunath, Sharath, Choy, Eddie-Lun Tik, Dejaco, Andrew P., Ananthapadmanabhan, Arasanipalai K., Huang, Pengjun
• Granted Patent: US 8,660,840 B2
• Time in Patent Office: Days
• US Class Current: 704/230
• CPC Class Codes: G10L 19/0204 using subband decomposition
• CPC Class Codes: G10L 19/032 Quantisation or dequantisation of spectral components
• CPC Class Codes: G10L 19/04 using predictive techniques
• CPC Class Codes: G10L 19/08 Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
• CPC Class Codes: G10L 19/097 using prototype waveform decomposition or prototype waveform interpolative [PWI] coders
• CPC Class Codes: G10L 19/26 Pre-filtering or post-filtering
• CPC Class Codes: G10L 25/12 the extracted parameters being prediction coefficients

Abstract

A method and apparatus for predictively quantizing voiced speech includes a parameter generator and a quantizer. The parameter generator is configured to extract parameters from frames of predictive speech such as voiced speech, and to transform the extracted information to a frequency-domain representation. The quantizer is configured to subtract a weighted sum of the parameters for previous frames from the parameter for the current frame. The quantizer is configured to quantize the difference value. A prototype extractor may be added to first extract a pitch period prototype to be processed by the parameter generator.

Claims

1. An apparatus comprising:

a unit to obtain a target error vector from parameters of a speech frame; and

a unit to quantize the target error vector and form quantized speech frame parameters therefrom.

2. A method for forming a set of quantized speech frame parameters, comprising:

obtaining a target error vector from parameters of a speech frame; and

quantizing the target error vector and forming quantized speech frame parameters therefrom.

3. An apparatus comprising:

means for obtaining a target error vector from parameters of a speech frame; and

means for quantizing the target error vector and forming quantized speech frame parameters therefrom.

4. A computer-readable medium comprising instructions that upon execution in a processor cause the processor to:

obtain a target error vector from parameters of an input speech frame; and

quantize the target error vector and form quantized speech frame parameters therefrom.