Patent Document ID: 7617096
Application ID: 10163378

Base Claim:
1. A method of quantizing a vector representative of a portion of a speech or audio signal in an encoder, comprising: (a) determining legal candidate codevectors among a set of candidate codevectors based upon one or more illegal space definitions, the candidate codevectors including line spectral frequencies (LSFs), wherein the one or more illegal space definitions define invalid spacing characteristics of LSFs; (b) determining a best legal candidate codevector among the legal candidate codevectors, whereby the best legal candidate codevector corresponds to a quantization of the vector; and (c) transmitting to a decoder a signal representative of the portion of the speech or audio signal based on the best legal candidate codevector.

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Claim 8:
8. The method of claim 1 , further comprising, prior to step (b): deriving a separate error term corresponding to each legal candidate codevector, each error term being a function of the vector and the corresponding legal candidate codevector, wherein step (b) comprises determining the best legal candidate codevector among the legal candidate codevectors based on the error terms.