Very short pitch detection and coding
AssigneeHuawei Technologies Co., Ltd.
InventorsYang Gao, Fengyan Qi
Life of this patent
Estimating the term…
Abstract
System and method embodiments are provided for very short pitch detection and coding for speech or audio signals. The system and method include detecting whether there is a very short pitch lag in a speech or audio signal that is shorter than a conventional minimum pitch limitation using a combination of time domain and frequency domain pitch detection techniques. The pitch detection techniques include using pitch correlations in time domain and detecting a lack of low frequency energy in the speech or audio signal in frequency domain. The detected very short pitch lag is coded using a pitch range from a predetermined minimum very short pitch limitation that is smaller than the conventional minimum pitch limitation.
Claims20
A method for pitch detection and coding, implemented by an apparatus for speech signal or audio signal coding, comprising:
- determining, in a speech signal or an audio signal, a pitch lag that is shorter than a first minimum pitch limitation using a combination of time domain and frequency domain pitch detection techniques, wherein the first minimum pitch limitation is predetermined for a range to encode the speech signal or the audio signal;
- and
- coding the pitch lag, which is in a range from a second minimum pitch limitation to the first minimum pitch limitation, for the speech signal or the audio signal, wherein the second minimum pitch limitation is smaller than the first minimum pitch limitation.
An apparatus that supports pitch detection and coding for speech signal or audio signal coding, comprising:
- a memory storing program instructions, and
- one or more processors coupled to the memory;
- wherein the one or more processors, by executing the program instructions, are configured to:
- determine, in a speech signal or an audio signal, a pitch lag that is shorter than a first minimum pitch limitation using a combination of time domain and frequency domain pitch detection techniques, wherein the first minimum pitch limitation is predetermined for a range to encode the speech signal or the audio signal;
- and
- code the pitch lag, which is in a range from a second minimum pitch limitation to the first minimum pitch limitation, for the speech signal or the audio signal, wherein the second minimum pitch limitation is smaller than the first minimum pitch limitation.
Dependencies are inferred from the claim text.