Abstract: A patient interface for delivery of a supply of pressurised air or breathable gas to an entrance of a patient's airways comprising: a cushion member that includes a retaining structure and a seal-forming structure permanently connected to the retaining structure; a frame member attachable to the retaining structure; and a positioning and stabilising structure attachable to the frame member.

Abstract: A video encoder (300) for compressing and encoding frames of an image sequence for transmission and a method of video encoding. The video encoder (300) has segmentation means (322) for recognising at least one object (450) in a frame (400) of an image sequence, and an encoder (304) for encoding blocks of the image sequence into a single bitstream for transmission, wherein blocks containing the at least one object being transmitted preferentially over other blocks. The segmentation means (322) may operate under user control (324). The video encoder (300) may be made compatible with the H.263 standard, whereby a standard H.263 receiver can then decompress and decode the transmitted image sequence. The invention may be incorporated into a mobile or a portable radio, or a mobile telephone.

Abstract: Apparatus and methods for controlling the amount of data used to transmit still images during the transmission of a video sequence from a first to a second location are disclosed. The apparatus of one embodiment comprises encoding means (105) arrange for intraframe encoding still images for transmission and intraframe encoding part or all of selected video sequence frames, calculating means (106) for determining the data size of intraframe encoded video sequence frames and control means (107) for controlling intraframe encoding of still images for transmission in dependence on the determined intraframe encoded size of a previous video sequence frame. The system can be operated in a way so as to remain H.263 compliant. Other embodiments control the data size by adjusting the quantization used for each Macroblock and by reprocessing each Group of Blocks until a desired data size is reached.