Patent ID: 8418037

Claim:
A method for decoding by using window-based least significant bits in robust header compression, which is used for a decompressor to decode a parameter field sent over by a compressor, this method including the following steps: (1) the decompressor obtaining an upper limit and a lower limit of an interpretation interval to determine the interpretation interval based on a saved value of the parameter field successfully decoded last time which acts as a reference value and by using an offset in context; (2) the decompressor determining high bits of a decoded value based on a k-bit data m received from the compressor as well as the upper limit and/or the lower limit of the interpretation interval, and constructing the decoded value composed of the determined high bits and the received k-bit data m which acts as the low bits, wherein k is a natural number and indicates a number of bits of the data, and m indicates a value of the data.