US 12,340,813 B2
Sound signal receiving and decoding method, sound signal decoding method, sound signal receiving side apparatus, decoding apparatus, program and storage medium
Takehiro Moriya, Tokyo (JP); Yutaka Kamamoto, Tokyo (JP); and Ryosuke Sugiura, Tokyo (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/617,840
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Dec. 27, 2019, PCT No. PCT/JP2019/051596
§ 371(c)(1), (2) Date Dec. 9, 2021,
PCT Pub. No. WO2020/250471, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. PCT/JP2019/023424 (WO), filed on Jun. 13, 2019.
Prior Publication US 2022/0246157 A1, Aug. 4, 2022
Int. Cl. G10L 19/008 (2013.01); G10L 19/16 (2013.01); G10L 21/038 (2013.01)
CPC G10L 19/008 (2013.01) [G10L 19/167 (2013.01); G10L 21/038 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A sound signal receiving and decoding method to be performed by a terminal apparatus connected to a first communication line and a second communication line with a lower priority level than the first communication line, the method comprising:
a reception step of determining whether or not an average value, for a plurality of sets each composed of a first code string received from the first communication line and a second code string received from the second communication line corresponding to the first code string, of a difference between times at which the first code string and the second code string were received for each set is less than a predetermined time limit Tmin,
if the average value is less than the time limit Tmin in the determination, for a frame after the determination, outputting a monaural code included in the first code string input from the first communication line and an extended code having the same frame number as the monaural code among extended codes included in the second code string input from the second communication line, and
if the average value is not less than the time limit Tmin in the determination, for a frame after the determination, outputting the monaural code included in the first code string input from the first communication line and an extended code having the closest frame number to that of the monaural code among the extended codes included in the second code string input from the second communication line; and
a decoding step of, for a frame after the determination, obtaining and outputting decoded digital sound signals of C (C being an integer that is at least 2) channels based on the monaural code output in the reception step and the extended code output in the reception step.