摘要:
The invention relates to the compression coding of video signals. The invention may be applied in some embodiments to the compression coding of three dimensional television (3DTV) signals. The invention provides a method of coding of a video signal, in which the presence of at least a first image area and a second image area in a picture, in which the images in the first image area and in the second image area are substantially identical is determined. In response to a positive determination, picture information in one image area is compression coded without reference to picture information in another image area. The invention also provides a video coder for coding a video signal.
摘要:
There is provided a method in a network recording apparatus, the method comprising: receiving a video; determining how many clients the video is being distributed to; and encoding and storing of the video dependent upon how many clients the video is being distributed to.
摘要:
A method in an encoder, the method comprising: receiving a video; encoding a segment of the video at different bit rates to generate multiple representations of the segment at different bit rates; generating a quality metric for each representation of the video segment; and storing the lowest bit rate representation of the video segment for which the respective quality metric meets a predefined minimum quality threshold.
摘要:
A method of distributing a plurality of media content services (S1-S5) across a distribution network comprising dividing each of the plurality of media content services (S1-S5) into segments and transmitting the segments of each of the plurality of media content services as a sequence of bursts (305), wherein there is a window period (303) between successive bursts (305) during which media content is not transmitted. Each of the media content services (S1-S5) has a respective bit rate and the transmitting comprises transmitting each of the segments at a higher bit rate to create the window periods (303) between successive bursts (305). Starts of bursts (305) of the plurality of media content services (S1-S5) are staggered in time with respect to one another. At least one of the media content services (S1-S5) can comprise a plurality of media content service representations of different bit rate. The media content services and media content service representations can be transmitted as multicasts.
摘要:
The invention relates to a method of and apparatus for determining a composite video services stream comprising one or more video services for delivery across a digital subscriber loop. In some embodiments, the invention relates to a method of and apparatus for receiving a video service representation in a video services representation stream. In particular, embodiments of the invention enable a composite video services stream comprising one or more video services for delivery across a digital subscriber loop to be determined. Each video service is made available in a plurality of video service representations each having a different bit rate, the plurality of video service representations of a video service having aligned segment boundaries. The required video services for delivery across the digital subscriber loop are dynamically determined as well as the bandwidth available for delivery of the composite video services stream. One of the plurality of video service representations of a required video service for delivery across the digital subscriber loop is selected depending on at least the bandwidth available for the composite video services stream. If any video service request relates to a non-real-time video service, the non real-time video services stream may be buffered and the buffered video services stream may be sent at an actual transfer rate that depends on the residual bandwidth available for transfer of the video service representation after bandwidth is allocated to higher priority video services. A video service representation having a nominal transfer rate may be received at an actual transfer rate that may be higher than, or lower than, the nominal transfer rate and the transfer is discontinued at the determination of the end of the video services representation stream.
摘要:
Media content comprises video. The video comprises a sequence of scenes comprising pictures. The media content comprises segments. A method determines when a scene change between a first scene and a second, subsequent, scene occurs within a predetermined proximity to a boundary between segments. When a scene change occurs within a predetermined proximity of an end of a segment, at least a first picture in the second scene is discarded and an additional picture is inserted in the first scene. When a scene change occurs within a predetermined proximity of a start of a segment, at least one picture in the first scene is discarded and an additional picture is inserted in the second scene. The additional picture can be a repeat or a copy of an existing picture, or it can be based on at least one existing picture in the first scene, such as by interpolation.
摘要:
Media content comprises video. The video comprises a sequence of scenes comprising pictures. The media content comprises segments. A method determines when a scene change between a first scene and a second, subsequent, scene occurs within a predetermined proximity to a boundary between segments. When a scene change occurs within a predetermined proximity of an end of a segment, at least a first picture in the second scene is discarded and an additional picture is inserted in the first scene. When a scene change occurs within a predetermined proximity of a start of a segment, at least one picture in the first scene is discarded and an additional picture is inserted in the second scene. The additional picture can be a repeat or a copy of an existing picture, or it can be based on at least one existing picture in the first scene, such as by interpolation.