US 12,230,287 B2
Quantization scale factor determination device and quantization scale factor determination method
Akira Harada, Kanagawa (JP); and Hiroyuki Ehara, Kanagawa (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA, Torrance, CA (US)
Appl. No. 17/768,801
Filed by Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
PCT Filed Sep. 4, 2020, PCT No. PCT/JP2020/033579
§ 371(c)(1), (2) Date Apr. 13, 2022,
PCT Pub. No. WO2021/075167, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 2019-189177 (JP), filed on Oct. 16, 2019.
Prior Publication US 2023/0025447 A1, Jan. 26, 2023
Int. Cl. G10L 19/035 (2013.01)
CPC G10L 19/035 (2013.01) 10 Claims
OG exemplary drawing
 
1. A quantization scale factor determination apparatus, comprising:
correction circuitry, which, in operation, corrects an initial value of a quantization scale factor based on whether or not a spectrum of a speech audio signal has sparsity; and
search circuitry, which, in operation, searches for the quantization scale factor based on the initial value.