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Apparatus, a method and a computer program for video coding and decoding

專利號(hào)
US11800131B2
公開(kāi)日期
2023-10-24
申請(qǐng)人
NOKIA TECHNOLOGIES OY（FI Espoo）
發(fā)明人
Miska Matias Hannuksela; Kemal Ugur
IPC分類
H04N19/463; H04N19/70; H04N19/30; H04N19/61
技術(shù)領(lǐng)域
prediction,picture,bitstream,layer,pictures,syntax,coded,in,decoding,nal
地域： Espoo

摘要

A method comprising encoding a bitstream comprising a base layer, a first enhancement layer and a second enhancement layer; encoding an indication of both the base layer and the first enhancement layer used for prediction for the second enhancement layer in the bitstream; encoding, in the bitstream, an indication of a first set of prediction types that is applicable from the base layer to the second enhancement layer, wherein the first set of prediction types is a subset of all prediction types available for prediction between layers, and encoding, in the bitstream, an indication of a second set of prediction types that is applicable from the base layer or the first enhancement layer to the second enhancement layer, wherein the second set of prediction types is a subset of all prediction types available for prediction between layers.

說(shuō)明書(shū)

?for( i = 1; i <= vps_max_layers_minus1; i++ ) { ??// layer dependency ??num_direct_ref_layers[ i ] u(6) ??for( j = 0; j < num_direct_ref_layers[ i ]; j++ ) { ???ref_layer_id[ i ][ j ] u(6) ???custom character ?[ i ][ j ] u(v) ??} ?} }

The new syntax elements, prediction_type_mask_len and prediction_type_mask[i][j], are shown in Table 4 in italics. The semantics of said syntax elements may be specified as follows:

    • prediction_type_mask_len specifies the number of bits in the prediction_type_mask[i][j] syntax element.
      prediction_type_mask[i][j] specifies which types of dependencies or prediction are used from a component picture having layer_id equal to ref_layer_id[i][j] to the component picture having layer_id equal to layer_id_in_nuh[i].

The types of prediction and their bit number in prediction_type_mask[i][j] may be specified according to Table 5 below. Bit number 0 is the least significant bit in prediction_type_mask[i][j].

權(quán)利要求

1
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