Methods and apparatus for a video coding system with the current picture referencing (CPR) mode enabled are disclosed. According to one method, when the current reference picture is equal to the current picture, an integer motion vector flag is inferred to be true without signalling the integer or parsing the motion vector flag. In another method, when all motion vector differences for the current block are equal to zero, an integer motion vector flag is inferred to be true without signalling the integer or parsing the motion vector flag. In yet another method, when all reference pictures for the current block are equal to the current picture: the sub-block prediction coding mode is disabled; and the current block is encoded or decoded by disabling the sub-block prediction coding mode. Alternatively, derived motion vectors associated with sub-blocks for the current block can be converted into integer motion vectors.
A method and apparatus for video coding using coding modes including a palette mode are disclosed. In one embodiment, the total number of palette indices in the current block is coded into a binary string using a TR (Trun-cated Rice) binarization process with the Rice parameter to generate a prefix part and using an EGk (k-th order Exp-Go -lomb) binary process to generate a suffix part for the binary string, or using the EGk binarization process with the Rice parameter (k). The suffix part is allowed to be empty. In another embodiment, a Rice parameter is determined. If the Rice parameter is equal to or greater than log-base-2 of current block size, the variable related to a total number of palette indices in the current block of video data is binarized into a binary string using a fixed-length code with bit length equal to log-base-2 of current block size.
A method and apparatus of video coding incorporating Deep Neural Network are disclosed. A target signal is processed using DNN (Deep Neural Network), where the target signal provided to DNN input corresponds to the reconstructed residual, output from the prediction process, the reconstruction process, one or more filtering processes, or a combination of them. The output data from DNN output is provided for the encoding process or the decoding process. The DNN can be used to restore pixel values of the target signal or to predict a sign of one or more residual pixels between the target signal and an original signal. An absolute value of one or more residual pixels can be signalled in the video bitstream and used with the sign to reduce residual error of the target signal.
In order to overcome the issue caused by a decoded block vector (BV) pointing to a reference block overlapping with an unavailable area, various methods are disclosed. According to one method, if the reference block overlaps with an unavailable area, the reference pixels in the unavailable area are generated for IntraBC prediction of the current block by padding from neighbouring available pixels. The padding can be done in the horizontal direction and then the vertical direction. The padding may also done in the vertical direction first and then horizontal direction. In another method, if the reference block overlaps with an unavailable area, the reference pixels in the unavailable area are generated for IntraBC prediction of the current block by using previous decoded pixels in the unavailable area. A pre-defined value may also be used for the unavailable area.
H04N 19/50 - Procédés ou dispositions pour le codage, le décodage, la compression ou la décompression de signaux vidéo numériques utilisant le codage prédictif
5.
METHOD OF MOTION INFORMATION PREDICTION AND INHERITANCE IN MULTI-VIEW AND THREE-DIMENSIONAL VIDEO CODING
A method for three-dimensional video coding using aligned motion parameter derivation for motion information prediction and inheritance is disclosed. Embodiments according to the present invention utilize motion parameters associated with a corresponding block for motion information prediction or inheritance. The aligned motion parameters may be derived by searching each current reference picture list of the current block to find a matched reference picture having a same POC (Picture Order Count) or a same view index as that of the reference picture pointed by the MV of the corresponding block. The aligned motion parameters may also be derived by searching each current reference picture list to check whether the reference picture index of the reference picture in the reference view to be inherited exceeds a maximum reference picture index of each current reference picture list of the current block.
H04N 19/597 - Procédés ou dispositions pour le codage, le décodage, la compression ou la décompression de signaux vidéo numériques utilisant le codage prédictif spécialement adapté pour l’encodage de séquences vidéo multi-vues
A method for cross-color Intra prediction using the LM Intra mode using multi-row or multi-column neighboring reconstructed pixels for LM parameter derivation or using only top pixels or left pixels of neighboring pixels is disclosed. Multiple LM Intra modes can be used. For example, three LM Intra modes can be used and the LM parameters for the three LM Intra modes can be determined based on only the top pixels, only the left pixels and both the top pixels and left pixels of neighboring reconstructed pixels respectively. To remove the need for additional buffer requirement for deriving the LM parameters based on using multi-row or multi-column neighboring reconstructed pixels, the current method re-uses existing buffers, where the buffers are used for deblocking. A syntax element can be used to indicate one of the multi-LM modes selected.
A method and apparatus for coding video data in a scalable or three-dimensional video coding system are disclosed. In one embodiment, context for the input data associated with an inter-layer or inter-view coding syntax element of a current block in an enhancement-layer (EL) or a dependent view is formed or the input data is parsed to identify the context based on information associated with one or more neighboring blocks, information associated with the current block, or both. In another embodiment, encoding or decoding is applied to the input data associated with the current block in the EL using inter-layer texture prediction based on the BL block in the BL, wherein a flag indicating whether there is any transform coefficient coded for the current block is signaled.
H04N 19/34 - Techniques d'échelonnage mettant en œuvre un codage progressif par plans de bits de la couche d'amélioration, p.ex. échelonnage granulaire fin [FGS]
H04N 19/136 - Caractéristiques ou propriétés du signal vidéo entrant
H04N 19/14 - Complexité de l’unité de codage, p.ex. activité ou estimation de présence de contours
H04N 19/176 - Procédés ou dispositions pour le codage, le décodage, la compression ou la décompression de signaux vidéo numériques utilisant le codage adaptatif caractérisés par l’unité de codage, c. à d. la partie structurelle ou sémantique du signal vidéo étant l’objet ou le sujet du codage adaptatif l’unité étant une zone de l'image, p.ex. un objet la zone étant un bloc, p.ex. un macrobloc
H04N 19/20 - Procédés ou dispositions pour le codage, le décodage, la compression ou la décompression de signaux vidéo numériques utilisant le codage d'objets vidéo
H04N 19/597 - Procédés ou dispositions pour le codage, le décodage, la compression ou la décompression de signaux vidéo numériques utilisant le codage prédictif spécialement adapté pour l’encodage de séquences vidéo multi-vues
8.
METHOD AND APPARATUS OF TEXTURE IMAGE COMPRESSION IN 3D VIDEO CODING
A method and apparatus for texture image compression in a 3D video coding system are disclosed. Embodiments according to the present invention derive depth information related to a depth map associated with a texture image and then process the texture image based on the depth information derived. The invention can be applied to the encoder side as well as the decoder side. The encoding order or decoding order for the depth maps and the texture images can be based on block-wise interleaving or picture-wise interleaving. One aspect of the present invent is related to partitioning of the texture image based on depth information of the depth map. Another aspect of the present invention is related to motion vector or motion vector predictor processing based on the depth information.
H04N 19/597 - Procédés ou dispositions pour le codage, le décodage, la compression ou la décompression de signaux vidéo numériques utilisant le codage prédictif spécialement adapté pour l’encodage de séquences vidéo multi-vues
H04N 19/176 - Procédés ou dispositions pour le codage, le décodage, la compression ou la décompression de signaux vidéo numériques utilisant le codage adaptatif caractérisés par l’unité de codage, c. à d. la partie structurelle ou sémantique du signal vidéo étant l’objet ou le sujet du codage adaptatif l’unité étant une zone de l'image, p.ex. un objet la zone étant un bloc, p.ex. un macrobloc
A communications system including communications devices is provided. A communications device, a trainer, generates at least one concatenated training sequence, transmits the at least one concatenated training sequence, and receives one or more response messages describing corresponding channel characteristics from at least one of the rest of the plurality of communications devices. One or more of the rest of the plurality of communications devices, trainees, each receives the at least one concatenated training sequence, determines channel characteristics between the trainer and a trainee according to the at least one received concatenated training sequence, embeds channel characteristics information to generate at least one of the response messages, and transmits the response message.
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