US 11,909,983 B2
Apparatus, a method and a computer program for video coding and decoding
Miska Hannuksela, Tampere (FI); Igor Curcio, Tampere (FI); Sujeet Shyamsundar Mate, Tampere (FI); Emre Aksu, Tampere (FI); and Ari Hourunranta, Tampere (FI)
Assigned to Nokia Technologies Oy, Espoo (FI)
Appl. No. 17/433,034
Filed by Nokia Technologies Oy, Espoo (FI)
PCT Filed Feb. 19, 2020, PCT No. PCT/FI2020/050104
§ 371(c)(1), (2) Date Aug. 23, 2021,
PCT Pub. No. WO2020/183055, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 20195187 (FI), filed on Mar. 14, 2019.
Prior Publication US 2022/0159267 A1, May 19, 2022
Int. Cl. H04N 19/105 (2014.01); H04N 19/159 (2014.01); H04N 19/172 (2014.01); H04N 19/146 (2014.01)
CPC H04N 19/146 (2014.11) [H04N 19/105 (2014.11); H04N 19/159 (2014.11); H04N 19/172 (2014.11)] 19 Claims
OG exemplary drawing
 
1. A method comprising:
encoding video media content into at least a first representation and a second representation, wherein:
the first representation comprises a switchable inter-coded picture, wherein the switchable inter-coded picture comprises a first characteristic that no pictures preceding the switchable inter-coded picture in decoding order are used as reference pictures for non-switchable pictures following the switchable inter-coded picture in decoding order; and
the second representation comprises one or more decoder reset pictures aligned with switchable inter-coded pictures of the first representation,
wherein a frame rate of the second representation is smaller than or equal to a frame rate of the first representation and resolutions of the first and the second representations are equal or substantially equal,
wherein the first representation and the second representation are encoded to enable decoding of a decoder reset picture of the second representation, followed by decoding of pictures of the first representation that are subsequent to a switchable inter-coded picture of the first representation that corresponds to the decoder reset picture, without the corresponding switchable inter-coded picture having been decoded.