Abstract: Systems, methods, and devices for generating a constant bitrate (CBR) transport stream in manners that facilitate subsequent reconstruction, and for performing such reconstruction are disclosed herein. For example, generating a CBR transport stream may include for each payload packets: sampling a clock source to obtain a clock sample; and inserting an encoding of the clock sample in a stuffing area of a header of the payload packet. For example, reconstructing a CBR transport stream may include receiving a plurality of packets of a variable bitrate (VBR) transport stream; for a pair of adjacent packets in the VBR transport stream: extracting a clock sample from a header of each of the pair adjacent packets; computing a delta between the clock samples; and inserting one or more null packets between the adjacent packets based on the computed delta and a timing metric corresponding to a bitrate of the CBR transport stream.

Abstract: Systems, methods, and devices for inserting content into a video frame are disclosed herein. A frame of video data encoded to include a plurality of macroblocks is received. An insertion region of the frame for inserting content is defined, the insertion region spanning a subset of the macroblocks. The frame is augmented with a duplication region configured as a non-displayed region, the duplication region including duplicated macroblocks that duplicate the macroblocks of insertion region. The macroblocks of the insertion region are replaced with replacement macroblocks that encode replacement content.

Abstract: The present invention relates to a method of and apparatus for compression encoding of a picture in a picture sequence. In particular, the invention relates to a method of and apparatus for compression encoding of a picture in a picture sequence so as to maintain a good picture quality while providing compression coding and decoding with low latency. The invention provides a method of compression encoding a picture in a picture sequence in which the pictures in the picture sequence are coded as prediction coded pictures with a single reference picture and have at least two macroblock sets. One set is a refresh set in which the macroblocks are intra-picture coded. The decoded compression coded picture information used for compression coding picture information is decoded without use of a de-blocking filter.