US 12,231,636 B2
Quantization of residuals in video coding
Guido Meardi, London (GB); Simone Ferrara, London (GB); and Lorenzo Ciccarelli, London (GB)
Assigned to V-NOVA INTERNATIONAL LIMITED, (GB)
Appl. No. 17/624,786
Filed by V-NOVA INTERNATIONAL LIMITED, London (GB)
PCT Filed Jul. 6, 2020, PCT No. PCT/GB2020/051618
§ 371(c)(1), (2) Date Jan. 4, 2022,
PCT Pub. No. WO2021/005347, PCT Pub. Date Jan. 14, 2021.
Claims priority of provisional application 62/984,261, filed on Mar. 2, 2020.
Claims priority of application No. 1909701 (GB), filed on Jul. 5, 2019; application No. 1909724 (GB), filed on Jul. 6, 2019; application No. 1909997 (GB), filed on Jul. 11, 2019; application No. 1910674 (GB), filed on Jul. 25, 2019; application No. 1911467 (GB), filed on Aug. 9, 2019; application No. 1911545 (GB), filed on Aug. 12, 2019; application No. 1911546 (GB), filed on Aug. 13, 2019; application No. 1914215 (GB), filed on Oct. 2, 2019; application No. 1914413 (GB), filed on Oct. 6, 2019; application No. 1914414 (GB), filed on Oct. 6, 2019; application No. 1914634 (GB), filed on Oct. 10, 2019; application No. 1915546 (GB), filed on Oct. 25, 2019; application No. 1915553 (GB), filed on Oct. 25, 2019; application No. 1916090 (GB), filed on Nov. 5, 2019; application No. 1918099 (GB), filed on Dec. 10, 2019; application No. 2000430 (GB), filed on Jan. 12, 2020; application No. 2000483 (GB), filed on Jan. 13, 2020; application No. 2000600 (GB), filed on Jan. 15, 2020; application No. 2000668 (GB), filed on Jan. 16, 2020; application No. 2001408 (GB), filed on Jan. 31, 2020; application No. PCT/GB2020/050695 (WO), filed on Mar. 18, 2020; application No. 2004131 (GB), filed on Mar. 20, 2020; application No. 2005652 (GB), filed on Apr. 18, 2020; and application No. 2006183 (GB), filed on Apr. 27, 2020.
Prior Publication US 2022/0360779 A1, Nov. 10, 2022
Int. Cl. H04N 19/124 (2014.01); H04N 19/176 (2014.01); H04N 19/184 (2014.01); H04N 19/30 (2014.01); H04N 19/31 (2014.01); H04N 19/33 (2014.01); H04N 19/39 (2014.01); H04N 19/44 (2014.01)
CPC H04N 19/124 (2014.11) [H04N 19/176 (2014.11); H04N 19/184 (2014.11); H04N 19/30 (2014.11); H04N 19/31 (2014.11); H04N 19/33 (2014.11); H04N 19/39 (2014.11); H04N 19/44 (2014.11)] 18 Claims
OG exemplary drawing
 
1. A method of encoding an input signal, the method comprising:
quantizing a set of data based on temporal information associated with said set of data, the set of data comprising coefficients corresponding to a frame of the input signal, the temporal information comprising an indication of those portions of the frame which are static and/or quasi-static with respect to one or more previous frames, the quantizing comprising:
determining a first quantization parameter for a first subset of data and a second quantization parameter for a second subset of data, the first subset of data and the second subset of data being subsets of the set of data selected in accordance with the temporal information, wherein the first quantization parameter and the second quantization parameter are different and are related according to a predefined formula,
wherein said quantizing includes subtracting a quantization offset value from a value associated with one coefficient included among the coefficients, and
wherein the quantization offset value is adjusted based on a sign of the one coefficient, said adjustment being performed to facilitate symmetrical operations about a zero value for the one coefficient.