Patent ID: 9135926
Filing Date: 2015-09-15
Classification: G10L,G11B,H03G

Abstract:
1. A speech codec quality improving apparatus comprising: a computer system comprising a processor and a memory; an energy calculation unit operating on the computer system and adapted to calculate an energy of a signal decoded by a low-band codec and low-band enhancement mode; and a scaling unit operating on the computer system and adapted to scale a size of the decoded signal by a gain when the gain is less than a threshold value, and wherein the low-band codec uses a G.711 codec, wherein the scaling unit performs the scaling in a silent segment, wherein the gain is based on the energy of current and previous frame and further calculated in the sample by sample, wherein the energy calculation unit calculates the energy of the low-band decoded signal in units of frames, energy of one of the frames is calculated by summing energies of the samples, and wherein the scaling unit is adapted to scale in units of samples for the size of the decoded signal.