Abstract: A method of predicting an objective quality score of an image or a video includes obtaining at least one selection feature associated with the image or video, and selecting, based on the at least one selection feature, a set of parameters among a plurality of sets of parameters of a learning based prediction model (LBPM). The selected set of parameters results from training the LBPM using training images or videos having the at least one selection feature. The method further includes determining the objective quality score of the image or video by applying the LBPM configured with the selected set of parameters, based on at least one qualifying feature associated with the image or video.

Abstract: Some aspects of the disclosure provide a method of media processing. The method includes encoding, by processing circuitry of a server device, first media data of a basic view of a scene and second media data of an alternate view of the scene into a bitstream. The second media data lacks reflectance information for one or more non-diffuse objects of the scene in the alternate view. The method further includes generating non-diffuse data that indicates the reflectance information for the one or more non-diffuse objects of the scene and transmitting the bitstream and the non-diffuse data to a client device. The non-diffuse data includes a first number of data pieces that indicate the reflectance information, the first number is smaller than a second number for pixels in the one or more non-diffuse objects. Apparatus and non-transitory computer-readable storage medium counterpart embodiments are also contemplated.

Abstract: A method of synthesizing an image includes receiving a coded video stream corresponding to different views of a scene acquired by a plurality of cameras, and identifying one or more derivable depth blocks of a target depth map corresponding to an image of the coded video stream. The method further includes determining a corresponding operation to derive a depth of each of the one or more derivable depth blocks, the operation being applied to a depth of a reference depth block included in a depth map of a reference image in the coded video bitstream. The method further includes obtaining the target depth map corresponding to the image by executing the corresponding operation of the respective derivable depth block, and synthesizing a new image according to the target depth map and at least one decoded image from the coded video stream.

Abstract: Aspects of the disclosure provides a method for updating an objective quality score of a video flow. The method includes determining the objective quality score of the video flow that is generated based at least on a game scenario. The objective quality score can indicate a quality of the video flow. The method further includes updating the objective quality score based on a mapping function parameterized by at least one update parameter. The at least one update parameter can be dependent on at least one characteristic of the game scenario and at least one characteristic of a video encoder that is configured to encode the video flow. Apparatus and non-transitory computer-readable storage medium counterpart embodiments are also contemplated.