Patent ID: 11917164
Assignee: TENCENT AMERICA LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. An apparatus for video encoding, comprising:
processing circuitry configured to:
receive samples of a current block in a current picture;
encode the samples of the current block according to a matrix based intra prediction to obtain encoded data, the samples of the current block are encoded by performing:
determination of entries of a vector based on neighboring samples of the current block, each entry of the entries being determined based on corresponding one or more of the neighboring samples of the current block, the entries of the vector being in an internal bit form having an internal bit depth greater than a threshold bit depth for using a first multiplication tool implemented in the apparatus that processes fewer bits than a second multiplication tool implemented in the apparatus;
conversion of the entries of the vector into a reduced bit form having a reduced bit depth satisfying the threshold bit depth for using the first multiplication tool implemented in the apparatus;
multiplication, using the first multiplication tool, of the entries of the vector in the reduced bit form and entries of a matrix to calculate a subset of prediction samples of the current block;
determination of other ones of the prediction samples of the current block based on the subset of the prediction samples of the current block; and
encoding of the samples of the current block according to the prediction samples of the current block; and

generate a coded video bitstream, the coded video bitstream including the encoded data and prediction information indicative of the matrix based intra prediction for the current block.