METHOD AND APPARATUS FOR PACKET HEADER COMPRESSION

摘要

To compress headers efficiently, headers may be differentially encoded. In one embodiment, a difference between a current field and a reference field can be used in a reduced header. In another embodiment, the least significant bits of the current field can be used to represent the current field. When such a field is received, the most significant bits of a reference field are needed to decompress the field. In addition, the present principles determine the typical usage scenarios that may benefit from header compression and further determine that some fields can be removed in a reduced header or be represented by fewer bits. Header compression may impose constraints on the representation of the current field. The present principles recognize constraints on using reduced headers and provide rules and guidelines on applying header compression.

主权项

1. A method of transmitting data, comprising:
encapsulating at least one of video data and audio data in a datastream comprising a plurality of transport packets, each transport packet comprising a header portion and a payload portion; determining whether a particular transport packet can be transmitted using one of a full size packet header format and a reduced size packet header format; forming transport packets for the datastream in response to the determined format; and transmitting the formed transport packets.