摘要:
A multipoint control unit (MCU) for facilitating communication between a plurality of endpoints. Each endpoint sends a compressed video signal and receives a compressed video signal. The MCU has a plurality of video input modules and a video output module. Each of the video input modules receives a video signal from one of the endpoints and generally decodes the data into a primary data stream and a secondary data stream. The video output module includes a rate control unit and a generalized encoder that receive the primary and secondary data streams for generally encoding to a compressed output stream for transmission to an endpoint.
摘要:
Some demonstrative embodiments include devices, systems and/or methods of dual-mode wireless communication. Some embodiments include a wireless dual-mode transceiver capable of operating at first and second wireless communication modes during first and second time periods, respectively, wherein at the first communication mode the transceiver is capable of performing wireless-local-area-network communications over a wireless-local-area-network link, and wherein at the second communication mode the transceiver is capable of performing wireless video communications over a wireless video communication link. Other embodiments are described and claimed.
摘要:
Some demonstrative embodiments include devices, systems and/or methods of registering wireless video communication modules. A method of registering wireless video modules may include, for example, transmitting a first registration message from a first wireless video communication module to a second wireless video communication module, wherein the first registration message includes first information identifying the first module to the second wireless video communication module; receiving at the first module a second registration message from the second wireless video communication module, wherein the second registration message includes second information identifying the second module to the first wireless video communication module; and based on the first and second registration messages, registering the first video communication module at the second wireless video communication module and the second video communication module at the first wireless video communication module. Other embodiments are described and claimed.
摘要:
A diversity transmission scheme uses a number of antennas that is greater than the limitation of two transmitting antennas in the well-known Alamouti scheme. In an embodiment comprising four antennas, the antennas transmit in pairs such that each antenna transmits a block that is used in the Alamouti scheme. This increases the transmission rate. For example, the transmission of two signals at a given time slot increases transmission rate by a factor of two. The invention not only increases the number of antennas, but also increases the transmission rate. At the receiver end, the code is decoded without matrix inversion and without much noise enhancement. Moreover, noise enhancement stability is increased by a simple, partial interference cancellation scheme, that results in improved decoding performance.
摘要:
Disclosed is a method, circuit and system for transmission and reconstruction of a video block. A video stream may be composed of sequential video frames, and each video frame may be composed of one or more video blocks including a set of pixels. Prior to transmission of the data associated with a video block, the video block data may be transformed into a set of transform (e.g. frequency) coefficients using a spatial to frequency transform such as a two dimensional discrete cosine transform. Selection of the subset of transform coefficients to be transmitted may be based on a characteristic of the video block.
摘要:
An apparatus and method for compressing binarized images (90) comprising receiving a binarized image (70) and generating a first sequence of first code symbols (80) representing the binarized image wherein at least one row of the image is represented in run-length encoded format and encoding a portion of the first sequence of code symbols using a preliminary encoding scheme, thereby to provide a first portion of a second sequence of code symbols, and, while encoding, accumulating the frequency of at least some of the first code symbols thus far encoded (100) and generating an additional portion of the second sequence using a modified version of the code scheme such that at least one subsequent code symbol in the first sequence with a large accumulated frequency is encoded more compactly in the second portion than at least one subsequent code symbol in the first sequence with a small accumulated frequency.
摘要:
Some demonstrative embodiments include devices, systems and/or methods of wireless communication. A local wireless video communication network may include, for example, a first group of wireless video source modules capable of transmitting wireless video transmissions; and a second group of wireless video destination modules capable of receiving the wireless video transmissions, wherein the source modules and destination modules are capable of communicating with one another according to a bipartite communication scheme such that each destination module is capable of receiving a wireless video transmission from only a single source module at a given moment, and wherein the number of modules in at least one of the first and second groups is equal to or greater than two. Other embodiments are described and claimed.
摘要:
Some demonstrative embodiments include devices, systems and/or methods of dual-mode wireless communication. Some embodiments include a wireless dual-mode transceiver capable of operating at first and second wireless communication modes during first and second time periods, respectively, wherein at the first communication mode the transceiver is capable of performing wireless-local-area-network communications over a wireless-local-area-network link, and wherein at the second communication mode the transceiver is capable of performing wireless video communications over a wireless video communication link. Other embodiments are described and claimed.
摘要:
A system separates unknown signals which have been combined together through unknown linear filters and for which observations at multiple sensors are made. In a two channel circuit with two inputs and two sensors, the reconstructed source signals are assumed to be decorrelated such that the cross-correlation between the reconstructed source signals is near zero. The transfer functions which represent the crosstalk processes are estimated. The output signals are detected and the transfer functions are recursively solved. A reconstruction filter is used to recover the original input signals.