US 11,721,349 B2
Methods, encoder and decoder for linear predictive encoding and decoding of sound signals upon transition between frames having different sampling rates
Redwan Salami, Saint-Laurent (CA); and Vaclav Eksler, Sherbrooke (CA)
Assigned to VOICEAGE EVS LLC, Newport Beach, CA (US)
Filed by VOICEAGE EVS LLC, Newport Beach, CA (US)
Filed on Aug. 10, 2021, as Appl. No. 17/444,799.
Application 17/444,799 is a continuation of application No. 16/594,245, filed on Oct. 7, 2019, granted, now 11,282,530.
Application 16/594,245 is a continuation of application No. 15/815,304, filed on Nov. 16, 2017, granted, now 10,468,045, issued on Nov. 5, 2019.
Application 15/815,304 is a continuation of application No. 15/814,083, filed on Nov. 15, 2017, granted, now 10,431,233, issued on Oct. 1, 2019.
Application 15/814,083 is a continuation of application No. 14/677,672, filed on Apr. 2, 2015, granted, now 9,852,741, issued on Dec. 26, 2017.
Claims priority of provisional application 61/980,865, filed on Apr. 17, 2014.
Prior Publication US 2021/0375296 A1, Dec. 2, 2021
Int. Cl. G10L 19/04 (2013.01); G10L 19/12 (2013.01); G10L 19/06 (2013.01); G10L 19/16 (2013.01); G10L 19/24 (2013.01); G10L 19/26 (2013.01); G10L 25/06 (2013.01); G10L 19/07 (2013.01); G10L 21/038 (2013.01); G10L 19/00 (2013.01)
CPC G10L 19/12 (2013.01) [G10L 19/06 (2013.01); G10L 19/167 (2013.01); G10L 19/173 (2013.01); G10L 19/24 (2013.01); G10L 19/26 (2013.01); G10L 25/06 (2013.01); G10L 19/07 (2013.01); G10L 21/038 (2013.01); G10L 2019/0002 (2013.01); G10L 2019/0004 (2013.01); G10L 2019/0016 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for interpolating LP filter parameters in a current sound signal processing frame following a previous sound signal processing frame, the previous frame using an internal sampling rate S1 and the current frame using an internal sampling rate S2 and defining a number of subframes, comprising:
providing LP filter parameters from the previous frame at the internal sampling rate S1;
providing LP filter parameters from the current frame at the internal sampling rate S2;
converting the LP filter parameters from the previous frame from the internal sampling rate S1 to the internal sampling rate S2;
transforming the LP filter parameters to a quantization and interpolation domain; and
computing LP filter parameters of at least one of the subframes of the current frame using a weighted sum of the LP filter parameters from the current frame at the internal sampling rate S2 and the LP filter parameters from the previous frame at the internal sampling rate S2.