A system and method for optimizing video for transmission on a device includes, in one example, the method includes capturing an original video frame and scaling the original video frame down to a lower resolution video frame. The lower resolution video frame is downscaled using a first encoder to produce a first layer output and the first layer output is decoded. The decoded first layer output is upscaled to match a resolution of the original video frame. A difference is obtained between the upscaled decoded first layer output and the original video frame. The difference is independently encoded using a second encoder to create a second layer output. The first and second layer outputs may be stored or sent to another device.

A block-request streaming system provides for improvements in the user experience and bandwidth efficiency of such systems, typically using an ingestion system that generates data in a form to be served by a conventional file server (HTTP, FTP, or the like), wherein the ingestion system intakes content and prepares it as files or data elements to be served by the file server. The system might include controlling the sequence, timing and construction of block requests, time based indexing, variable block sizing, optimal block partitioning, control of random access point placement, including across multiple presentation versions, dynamically updating presentation data, and/or efficiently presenting live content and time shifting.

A video decoder chipset comprises a video decoder function, an upscaler function and a combiner function. The video decoder function is configured to (i) decode encoded video data to generate decoded video data at a first level of quality, the encoded video data having been derived by an encoder using first video data at a second, higher level of quality and (ii) output the decoded video data for storage in a memory. The upscaler function is configured to (i) obtain the decoded video data from the memory and (ii) upscale the obtained decoded video data to generate second video data at the second level of quality. The combiner function is configured to (i) obtain residual data, the residual data having been derived by the encoder based on the first video data and the second video data, (ii) combine the second video data with the residual data to generate enhanced video data, and (iii) output the enhanced video data.

The disclosure provides methods for transmitting and receiving video data, and a terminal device and a server. The server layers an original video into a plurality of video data streams, embeds extended information including feature information of a video data stream in a specified video data stream and transmits the plurality of video data streams to corresponding channels respectively for transmitting. A multicast prediction model in the terminal device may output a multicast access strategy based on the feature information of the video data stream and user experience information of the currently played video, and then a multicast combination currently accessed by the terminal device is adjusted based on the multicast access strategy to obtain a better multicast combination in the current network transmission environment, such that video data streams of corresponding quantities and quality are received. The above methods executed by the server and the terminal device can realize control of network congestion without increasing bandwidth consumption.

A block-request streaming system provides for low-latency streaming of a media presentation. A plurality of media segments are generated according to an encoding protocol. Each media segment includes a random access point. A plurality of media fragments are encoded according to the same protocol. The media segments are aggregated from a plurality of media fragments.

An image data of pictures constituting moving image data is encoded to generate an encoded video stream. In this case, the image data of the pictures constituting the moving image data is classified into a plurality of levels and encoded to generate a video stream having the image data of the pictures at the respective levels. Hierarchical composition is equalized between a low-level side and a high-level side, and corresponding pictures on the low-level side and the high-level side are combined into one set and are sequentially encoded. This allows a reception side to decode the encoded image data of the pictures on the low-level side and the high-level side with a smaller buffer size and a reduced decoding delay.

Several embodiments of scalable image processing systems and methods are disclosed herein whereby color management processing of source image data to be displayed on a target display is changed according to varying levels of metadata.

The reception side can easily acquire at least function enhancement information inside a codec.

Image data of each picture of a base layer is encoded to generate a first encoded stream, and image data of each picture of an enhanced layer is encoded to generate a second encoded stream. The first encoded stream and the second encoded stream are transmitted. Function enhancement information including at least function enhancement information inside a codec is transmitted outside the encoded stream. For example, the function enhancement information further includes function enhancement information outside the codec.

Systems, methods and apparatus for processing visual media data are described. One example method includes performing a conversion between visual media data and a visual media file that includes one or more tracks that store one or more bitstreams of the visual media data according to a format rule; wherein the format rule specifies whether to include, in a configuration record of a track, a first element indicative of a picture width of the track and/or a second element indicative of a picture height of the track is based on (1) whether a third element indicative of whether the track contains a specific bitstream corresponding to a specific output layer set and/or (2) whether the configuration record is for a single-layer bitstream, and wherein the format rule further specifies that the first element and/or the second element, when included in the configuration record of the track, are represented in a field including 16 bits.

Systems, methods and apparatus for processing visual media data are described. One example method includes performing a conversion between visual media data and a visual media file that includes one or more tracks that store one or more bitstreams of the visual media data according to a format rule; wherein the visual media file includes an operating point record and an operating point group box, and wherein the format rule specifies to include, for each operating point indicated in the visual media file, in the operating point record and the operating point group box, a first element indicative of a chroma format, a second element indictive of a bit depth information, a third element indicative of a maximum picture width, and/or a fourth element indicative of a maximum picture height.