Abstract:
The invention concerns a device for encoding video data, a device for decoding video data and a digital stream of video data. According to the invention, the encoding device comprises - means for encoding color information related to said video data according to one layer of a scalable model, - means for encoding transformation data enabling to obtain any level of said scalable model of color information from said one layer.
Abstract:
The present invention provides a method and a device for classifying data frames. The method is typically carried out by a communication device in a wireless network with quality of service capability. It comprises the step (1002) of comparing data in a frame to data in a plurality of classifier entries, wherein the order (102) of comparison of the classifier entries with a frame is a function of a quality of service priority level, and the step (1124) of classifying a frame for which a match is found as a function of a parameter associated with the matching classifier entry.
Abstract:
A method for automatic gain control used in a receiver of a multi-carrier telecommunication system, the method comprising: receiving an input signal digitalized by an A/D converter; determining distribution of the input signal; and controlling gain of a variable gain amplifier as a function of the determined distribution.
Abstract:
The present invention provides a direct-current cancellation apparatus and an OFDM receiver using the same and a direct-current cancellation method, and the direct-current cancellation apparatus comprises direct- current component estimating means for estimating the direct-current component (v) of a inputted digital signal according to the difference between statistic possibilities for the digital signal to be positive and negative; a subtracter for subtracting the estimated direct-current component (v) from the digital signal.
Abstract:
A method and apparatus for improving power performance of a wireless adapter which adopts a time slicing scheme by dividing a beacon interval into multiple slices, and assigning these slices to the stations through the beacon frame. The stations wakeup at the appointed slices to receive their buffered frames from an access point, and may enter into sleep state once the transactions conclude. A further embodiment including formatting data into a control frame for use in a wireless local area network, the frame including an indication, for each station associated with the wireless local area network, whether frames are buffered awaiting transmission to each respective station, a number of time intervals between control frames, and at which time interval the transmission of the buffered frames will begin for each station having buffered frames awaiting transmission.
Abstract:
The present invention provides a search method for an unstructured P2P network, comprising the steps of: selecting a subset of its neighbours adaptively in the unstructured P2P network by a querying peer; forwarding a Query message to the subset of its neighbours intelligently on the basis of a search criteria by the querying peer; and returning a QueryHit message to the querying peer in response to the Query message by a receiver peer, if the receiver peer in the subset of the querying peer's neighbours can provide a reply; otherwise, propagating the Query message to one of its neighbours having the most probability to respond to the Query message with a QueryHit message by the receiver peer.
Abstract:
A scalable video bitstream may have an H.264 /AVC compatible base layer (BL) and a scalable enhancement layer (EL), where scalability refers to color bit depth. The H.264/AVC scalability extension SVC provides also other types of scalability, e.g. spatial scalability where the number of pixels in BL and EL are different. According to the invention, BL information is upsampled in two logical steps (TUp, BDUp), one being texture upsampling and the other being bit depth upsampling. Texture upsampling is a process that increases the number of pixels, and bit depth upsampling is a process that increases the number of values that each pixel can have, corresponding to the pixels color intensity. The upsampled BL data are used to predict the collocated EL. The BL information is upsampled at the encoder side and in the same manner at the decoder side, wherein the upsampling refers to spatial and bit depth characteristics.
Abstract:
An adaptive and scalable packet error correction apparatus and method in a wireless multicast network is provided. Each retransmission request from a receiver contains a round number and the number of repairs sent in that round. At each receiver, there are two counters for counting the rounds sent out on the network and the number of repairs that have been required. A receiver on the wireless multicast network listens to the ARQ requests sent by other receivers to update the two counters and determines whether its request should be suppressed or be sent out.
Abstract:
The invention relates to a method for generating a saliency map for a picture of a sequence of pictures, the picture being divided in blocks of pixels. The method comprises a step for computing a saliency value for each block of the picture. According to the invention, the saliency value equals the self information of the block, the self information depending on the spatial and temporal contexts of the block.