Patent ID: 8340129
Filing Date: 2012-12-25
Classification: H04L

Abstract:
1. A method for compressing an extension field to be selectively included in a Real-time Transport Protocol (RTP) header, comprising the steps of: determining whether an RTP header extension field is included in the RTP header and recording information indicating a determination result; recording profile information of the RTP header extension field; recording total length information of the RTP header extension field; and recording, using a header extension information map, information indicating whether a current frame to be transmitted includes changed data than that included in a previously transmitted frame, wherein recording the total length information of the RTP header extension field comprises: checking if the total length information of the RTP header extension field included in the current frame to be transmitted matches that included in the previously transmitted frame; omitting the total length information of the RTP header extension field, when the total length information of the RTP header extension field matches that included in the previously transmitted frame; and recording the total length information, only when the total length information of the RTP header extension field is set to be different from that included in the previously transmitted frame.