Gain quantization for a CELP speech coder
First Claim
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1. A speech encoding system that receives an input speech signal, the speech encoding system comprising:
- a frame processor for processing a frame of the input speech signal, the frame processor including;
a pitch gain generator that derives unquantized pitch gains; and
a first vector quantizer that receives the unquantized pitch gains and generates quantized pitch gains;
a subframe processor that is configured to begin subframe processing after the pitch gain generator has derived the unquantized pitch gains and the first vector quantizer has generated the quantized pitch gains; and
wherein the speech encoding system is configured to convert the input speech signal into an encoded speech using results from the frame processor and the subframe processor.
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Abstract
There is provided a speech encoding system that receives a speech signal. The speech encoding system comprises a frame processor for processing a frame of the speech signal, where the frame processor includes a pitch gain generator that derives unquantized pitch gains, and a first vector guantizer that receives the unquantized pitch gains and generates quantized pitch gains. The speech encoding system also comprises a subframe processor that begins subframe processing after the pitch gain generator has derived the unquantized pitch gains and the first vector quantizer has generated the quantized pitch gains.
51 Citations
10 Claims
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1. A speech encoding system that receives an input speech signal, the speech encoding system comprising:
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a frame processor for processing a frame of the input speech signal, the frame processor including; a pitch gain generator that derives unquantized pitch gains; and a first vector quantizer that receives the unquantized pitch gains and generates quantized pitch gains; a subframe processor that is configured to begin subframe processing after the pitch gain generator has derived the unquantized pitch gains and the first vector quantizer has generated the quantized pitch gains; and wherein the speech encoding system is configured to convert the input speech signal into an encoded speech using results from the frame processor and the subframe processor. - View Dependent Claims (2, 3, 4, 5)
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6. A method for use in a speech encoding system that receives an input speech signal, the method comprising:
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processing a frame of the input speech signal using a frame processor by; deriving unquantized pitch gains using a pitch gain generator; and receiving the unquantized pitch gains by a first vector quantizer and generating quantized pitch gains; beginning subframe processing using a subframe processor after the pitch gain generator has derived the unquantized pitch gains and the first vector quantizer has generated the quantized pitch gains; and converting the input speech signal into an encoded speech using results from the frame processor and the subframe processor. - View Dependent Claims (7, 8, 9, 10)
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Specification