212 results about "Uncompressed video" patented technology

A method of rate control using a picture-based lookahead sliding window in a dual-pass transcoder / encoder compressed video architecture extracts statistics from an input video signal according to a simple compression standard, the input video signal being a compressed video signal for transcoding or an uncompressed video signal for encoding. A trans-factor is calculated for a current picture based on previous pictures in a sliding window to predict the complexity of the current picture, the trans-factor being a ratio of global complexity measures for the simple compression standard versus a sophisticated compression standard. Bits for the current picture are then allocated based on the complexity of future pictures in the sliding window. After encoding the current picture according to the sophisticated compression standard, the target bits of and the picture complexity in the sliding window, as well as the trans-factor, are updated as the window is moved by one picture. The extraction of the statistics is achieved in a transcoder by using a simple compression standard decoder to produce the statistics from the compressed video signal as the input video signal, and in an encoder by using a simple compression encoder to generate the statistics from the uncompressed video signal as the input video signal.

A method and system of wireless communication is provided which involves inputting information bits, wherein certain bits have higher importance level than other bits, and applying unequal protection to the bits at different importance levels. As such, important bits are provided with more protection for transmission and error recovery. Applying unequal protection involves using skewed constellations such that more important bits are provided with more error recovery protection.

A method, apparatus, and system for rapid switching between encoded video streams while introducing a reduced amount of additional information during the switch. For example, a method of encoding uncompressed video frames in accordance with embodiments of the invention includes producing a first stream having a first key frame, a second key frame, and a delta frame therebetween; and producing a second stream having said first key frame, said second key frame, and a third key frame therebetween, wherein said third key frame corresponds with said delta frame. Other features are described and claimed.

A communication system includes a transmitter and a receiver. The transmitter includes a video signal outputting unit for outputting an uncompressed video signal of a predetermined content, an identification information generating unit for generating identification information for identifying whether the predetermined content is a still picture content, and a transmitting unit for transmitting wirelessly the video signal outputted from the video signal outputting unit and the identification information generated in the identification information generating unit to the receiver. The receiver includes a receiving unit for receiving the video signal and the identification information transmitted wirelessly from the transmitter, a video signal processor for processing the video signal received in the receiving unit, and a controller for controlling an operation of the video signal processor based on the identification information received in the receiving unit.

A method and a system for bit reorganization and packetization of uncompressed video for transmission over wireless communication channels. The bit stream of the uncompressed video is reorganized according to importance levels of video bits. Then, various unequal protection methods such as encoding are applied to bits at different video importance levels. The reorganized and encoded information is then transmitted from a transmitter to a receiver over a wireless channel. The receiver performs the reverse steps of the transmitter, along with error detection / correction as needed, to recover the uncompressed video information.

Systems, devices and methods are implemented for compressing high-definition video content. Consistent with one such implementation, a device is implemented for preparing a media stream containing high-definition video content for transmission over a transmission channel. A receiver unit is arranged to receive the media stream in a high-definition encoding format that does not compress the high-definition video content contained therein. A decoder unit is arranged to decode the media stream. A compression unit is arranged to compress the decoded media stream to produce a compressed media stream. An encapsulation unit is arranged to encapsulate the compressed media stream within an uncompressed video content format. An encoding unit is arranged to encode the encapsulated media stream using the high-definition format to produce a data stream and may be arranged to encrypt the data stream, e.g., using High-Bandwidth Digital Content Protection (HDCP).

A method and system for transmitting uncompressed video information from a sender to a receiver over a wireless channel is described. Uncompressed video information bits are provided at the sender and the video information bits are packetized into one or more packets. A preamble to precede the data in each packet is provided, where the preamble includes a set of short training sequences and a set of long training sequences. Multiple packets are transmitted from the sender to the receiver over a wireless channel. In certain embodiments, the set of short training sequences includes seven short training sequences and the set of long training sequences includes two long training sequences, and the total length of the preamble is five orthogonal frequency-division multiplexing (OFDM) symbols long.

A method and system is provided for transmission of video information pixels over wireless channels, where each video pixel includes a plurality of components and each component comprises video information bits. The information bites are logically grouped into multiple logical groups in a packet, and error detection information is determined for each logical group. The error detection information is placed in the packet, and the packet is transmitted from a transmitter to a receiver over a wireless channel.

A method and system for communicating video information over wireless channels is provided. Communicating video information involves receiving a frame of video pixel information, partitioning spatially correlated pixels into different partitions and allocating pixel information from the pixel partitions across one or more of said multiple channels based on channel conditions. The allocated pixel information is transmitted on the one or more multiple channels.

A method and system for transmitting uncompressed video over a wireless channel by inputting a frame of pixel information, partitioning spatially correlated pixels into different packets, and transmitting the packets separately over a wireless channel. For robust transmission, error detection data can be generated for each packet and appended to each packet before transmission. A receiver receives the transmitted packets and checks if a received packet is corrupt based on the appended error detection data. For a corrupt packet, the receiver corrects the corrupt pixels using pixel information in other received packets containing neighboring pixels to recover each corrupt pixel in the corrupt packet.

Presented is a video distribution system that includes a transmitter that receives an uncompressed source video signal and includes a compressor for compressing the uncompressed source video signal into a compressed video signal having a bandwidth lower than the bandwidth of the uncompressed source video signal, a reformatter configured for reformatting the compressed video signal to simulate an uncompressed video signal having a bandwidth lower than the bandwidth of the uncompressed video signal. The video distribution system also includes a receiver that receives the compressed video signal that simulates an uncompressed video signal and includes a decompressor configured for decompressing the compressed video signal that simulates an uncompressed video signal into a decompressed video signal, and output port configured for transmitting the decompressed video signal to a display.

Uncompressed video information is transmitted over a wireless communication medium from a wireless sender device to a wireless receiver device. Progressive transmission data rate adaptation is performed on original uncompressed video pixel information. The progressive transmission data rate adaptation is performed on selected pixel information to obtain a rate-reduced pixel information. The rate-reduced pixel information requires a lower transmission data rate than the original frame. The rate-reduced pixel information is transmitted over the wireless communication medium to the wireless receiver device. At the receiver, a reverse operation is performed to recover the original uncompressed video pixel information.

A transmitter transmits an essentially uncompressed HDTV video by direct mapping of transformation coefficients of Y—Cr—Cb video components to communication symbols. A main portion of the important transform coefficients is sent in a coarse representation using, for example, QPSK or QAM. The coefficients representing the higher frequency of each of Y—Cr—Cb, as well as the quantization error values of the DC and near DC components, are sent as pairs of real and imaginary portions of a complex number that comprise a symbol. In the transmitter, a history containing certain information of some of the coefficients is maintained for the immediately preceding frame, and if a match is found, instead of repeating sending of these coefficients, additional high-frequency coefficients are sent. In the receiver, a history buffer containing certain information of some of the coefficients is maintained, and upon detection of an error the content of the buffer is used instead.

A method of processing an interactive service and an apparatus thereof are disclosed. The present invention includes receiving uncompressed audio contents or uncompressed video contents from an external decoding unit, extracting an identifier of a frame from the received content, sending a request containing the identifier to a server and receiving a trigger for the content from the server based on the request, wherein the trigger indicates the current time of the contents and references a particular interactive event in an application parameter table or signals that the event is to be executed now or at a specified future time and the application parameter table includes information about at least one of applications.

A method of transmitting uncompressed video over a wireless channel by inputting a frame of pixel information, partitioning spatially correlated (neighboring) pixels into different packets, generating error detection data for each packet and appending the error detection data to each packet, encoding the pixel data, and transmitting the packets separately over a wireless channel. A receiver receives the transmitted packets, decodes the packets, and checks if a received packet is corrupt based on the appended error detection data. For a corrupt packet, the receiver corrects the corrupt pixels using pixel information in other received packets containing neighboring pixels to recover each corrupt pixel in the corrupt packet.

The uncompressed wireless transmission of video, as with many other wireless applications, requires constant knowledge of channel characteristics at the receiver end. To estimate the channel and track its changes, pilots containing known data are sent in various parts of the used bandwidth. The use of such pilots reduces the effective bandwidth available for data transmission. Due to the relative high immunity to introduced interference of certain transmission modes, such as QPSK and QAM, pilots can be modulated by digital data components. At the receiver, pilots are demodulated and used for a decision-directed circuit to determine the characteristics of the transmission channel. The additional bandwidth allows a higher data rate which may be such used for various purposes as diversity, coding, etc. Such use of pilot signals is of particular advantage in the wireless transmission of the DC and near DC components of essentially uncompressed video.

A method and system for communication of uncompressed video information over a wireless channel, involving partitioning neighboring pixels in a video frame into different packets and transmitting the packets separately over a wireless channel. Redundancy information is generated for pixels in one or more packets and transmitted over the wireless channel. In case of packet loss or damage, the redundancy information can be used to recover the pixels in the lost or erroneous packet. The redundancy information can be transmitted to a receiver on a different channel than said packets. The redundancy information can be transmitted in one or more packets among the original pixel data packets.

An apparatus in a wireless network includes a video encoder for encoding uncompressed video information into packets with variable length of compressed frames, and a decision processor for selecting a partial bandwidth and queuing delay on a wireless channel for each of the packets based on an intended reception quality. Preferably, the queuing delay and partial bandwidth are one of a plurality of distinct queuing delay and partial bandwidth representative of wireless transmission quality of service classes.

Communication link including a cable containing four pairs of wires, three transmitters to transmit uncompressed video data and audio data over three of the pairs of wires to three receivers, and two transceivers to form a bidirectional multi data type communication link over the fourth pair of wires. An active mode of operation for transmitting the uncompressed video data and the audio data over the three pairs of wires, and for transmitting bidirectional data over the fourth pair of wires. And a first low power partial functionality mode of operation for transmitting bidirectional system controls.

A method includes decompressing first compressed video data to provide uncompressed video data in a first order. The method includes compressing the uncompressed video data to provide second compressed video data in a second order. The decompressing and compressing are based on first and second compression rates, respectively. The first order may be based on fundamental blocks of a frame of video data and the second order is based on lines of the frame of video data. The compressing may include alternating compression of partial portions of a first line of uncompressed video data with compression of partial portions of at least a second line of uncompressed video data to thereby generate a first line of compressed video data corresponding to the first line of uncompressed video data and at least a second line of compressed video data corresponding to the second line of uncompressed video data.

A system and method for providing content protection in a wireless network for transmitting uncompressed video data is disclosed. An association request is received from a new device by a domain manger. A proximity control test is conducted to determine whether the new device is located within an acceptable distance from the domain manager. The association request is granted or rejected based at least partly on the result of the proximity control test. An authorization token is transmitted to the new device when the association request is granted.

A method for receiving encoded MPEG-2 video signals and transcoding the received encoded signals to encoded H.264 reduced resolution video signals, including the following steps: decoding the encoded MPEG-2 video signals to obtain frames of uncompressed video signals and to also obtain MPEG-2 feature signals; deriving H.264 mode estimation signals from the MPEG-2 feature signals; subsampling the frames of uncompressed video signals to produce subsampled frames of video signals; and producing the encoded H.264 reduced resolution video signals using the subsampled frames of video signals and the H.264 mode estimation signals.

A method of processing an interactive service and an apparatus thereof are disclosed. The present invention includes receiving uncompressed audio content or uncompressed video content from an external decoding unit, extracting identifiers of frames from the received content periodically, submitting requests containing the identifiers and receiving a trigger for the content when a new segment is detected or when an event activation needs to be communicated to the receiver, wherein the trigger indicates the current time of the contents and references a particular interactive event in an application parameter table or signals that the event is to be executed now or at a specified future time, wherein the application parameter table includes information about at least one of applications.

A video processing device includes a video processing unit that decodes a video input signal into a decoded video signal in accordance with a video compression protocol, based on uncompressed video frame data. A tile engine includes a tile accumulation module that accumulates the uncompressed video frame data into a plurality of tile units, wherein each of the plurality of tile units includes a plurality of video span units. A tile compression / decompression module generates compressed video frame data for storage in a compressed video frame buffer by compressing the plurality of video span units into a plurality of compressed video span units and further that retrieves the compressed video frame data from the compressed video frame buffer by retrieving the plurality of compressed video span units and generating the uncompressed video frame data by decompressing the plurality of compressed video span units.

A video-information encoding apparatus and decoding apparatus with a guarantee of a fixed processing time. By limiting the amount of data to be input into / output from a CABAC encoding unit and decoding unit on a unit-of-encoding basis, such as one picture, slice, macroblock or block, and by encoding uncompressed video data, it is possible to provide a video-information encoding apparatus and decoding apparatus with a guarantee of a fixed processing time. Thereby, an apparatus with a guarantee of the processing time can be mounted.

A video receiver is operable to receive video bitstreams from a video transmitter over, for example, a wireless high definition transmission link. The received video bitstreams comprises a plurality of video frames and corresponding coding information. The coding information such as, for example, block motion vectors, block coding modes, quantization levels, and / or quantized residual data, is extracted for performing frame-rate up-conversion on the received plurality of video frames. The coding information is generated at the video transmitter via entropy decoding on a compressed video from a video feed from, for example, an IP TV network. When an uncompressed video is received, the video receiver is operable to perform frame-rate up-conversion on the received uncompressed video using extracted block motion vectors and associated confidence-consistence measure. When a compressed video is received, the video receiver is configured to perform video decompression on the received compressed video prior to the frame-rate up-conversion.