An image decoding method according to the present disclosure presents indication information related to whether deblocking parameters for a deblocking filtering procedure exist in a picture header or a slice header.

An image decoding method according to the present disclosure presents indication information related to whether deblocking parameters for a deblocking filtering procedure exist in a picture header or a slice header.

A (decoded) picture may be split into subpictures/tiles. Information on the subpictures may be obtained by a decoding device, and a decoding procedure may be performed on the basis of the information on the subpictures. In addition, information on the tiles may be obtained by a decoding device, and a decoding procedure may be performed on the basis of the information on the tiles. According to embodiments of the present document, subpicture-related information and tile-related information can be efficiently signaled, and an in-loop filtering procedure can be performed on the basis of the subpicture-related information.

A (decoded) picture may be split into subpictures/tiles. Information on the subpictures may be obtained by a decoding device, and a decoding procedure may be performed on the basis of the information on the subpictures. In addition, information on the tiles may be obtained by a decoding device, and a decoding procedure may be performed on the basis of the information on the tiles. According to embodiments of the present document, subpicture-related information and tile-related information can be efficiently signaled, and an in-loop filtering procedure can be performed on the basis of the subpicture-related information.

The present disclosure relates to an image processing apparatus and method capable of suppressing an increase in load of inverse adaptive color transform processing while suppressing an increase in distortion of coefficient data subjected to inverse adaptive color transform.

The coefficient data subjected to the lossless adaptive color transform is clipped at a level based on a bit depth of the coefficient data, and the coefficient data clipped at the level is subjected to lossless inverse adaptive color transform. The present disclosure may be applied to, for example, an image processing apparatus, an image coding device, an image decoding device, a transmission device, a reception device, a transmission/reception device, an information processing device, an imaging device, a reproduction device, an electronic device, an image processing method, an information processing method, or the like.

Methods and apparatus for video processing are disclosed. The processing may include video encoding, video decoding, or video transcoding. One example method includes performing a conversion between a video including a picture including one or more slices and a bitstream of the video. The conversion conforms to a rule that specifies that whether a deblocking filter is applied to the one or more slices referring to a picture parameter set is based at least on a first syntax element included in the picture parameter set. The first syntax element indicates whether the deblocking filter is disabled for the picture.

A video processing method includes performing a conversion between a video block of a video and a bitstream of the video according to a rule. The rule specifies whether or how usage of a secondary transform within a video unit is indicated in the bitstream. The secondary transform is applied before quantization or after de-quantization.

An image decoding method carried out by a decoding device, according to the present document, comprises the steps of: acquiring a sign data hiding enable flag; acquiring a transform skip residual coding (TSRC) enable flag on the basis of the sign data hiding enable flag; acquiring residual information for a current block, on the basis of the TSRC enable flag; deriving a residual sample of the current block, on the basis of the residual information; and generating a reconstructed picture on the basis of the residual sample, wherein the sign data hiding enable flag is a flag indicating whether sign data hiding is enabled, the TSRC enable flag is a flag indicating whether TSRC is enabled, and the TSRC enable flag is acquired on the basis of the sign data hiding enable flag having a value of zero.

A video processing method includes performing a conversion between a video comprising a video unit and a bitstream of the video according to a rule. The rule specifies whether or how to include, in an adaptation parameter set (APS), information related to a scaling list of the video is based on a first syntax element. The first syntax element indicates whether the APS includes chroma component related syntax elements and is independent of one or more syntax elements in a sequence parameter set (SPS).

A method for synchronizing an action of a target object with source audio is provided. Facial parameter conversion is performed on an audio parameter of the source audio at different time periods to obtain source parameter information of the source audio at the respective time periods. Parameter extraction is performed on a target video that includes the target object to obtain target parameter information of the target video. Image reconstruction is performed on the target object in the target video based on the source parameter information of the source audio and the target parameter information of the target video, to obtain a reconstructed image. Further, a synthetic video is generated based on the reconstructed image, the synthetic video including the target object, and the action of the target object being synchronized with the source audio.