Abstract: The present disclosure provides a system that can receive a group of channels (at least one of which includes an I-frame) from a DSL network, a memory that can store the I-frames, and a channel change detector that can detect a user's selection of a particular channel. If the memory contains the I-frame corresponding to the particular channel and if an I-frame has not been received from the DSL network, then the system provides the stored I-frame from the memory to the user.

Abstract: An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame.

Abstract: An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame.

Abstract: Techniques and tools for bitstream-controlled filtering are described. For example, a video encoder puts control information into a bitstream for encoded video. A video decoder decodes the encoded video and, according to the control information, performs post-processing filtering on the decoded video with a de-ringing and/or de-blocking filter. Typically, a content author specifies the control information to the encoder. The control information itself is post-processing filter levels, filter selections, and/or some other type of information. In the bitstream, the control information is specified for a sequence, scene, frame, region within a frame, or at some other syntax level.

Abstract: A method and apparatus for generating a Cyclic Redundancy Check (CRC) encoded message in a communication system are provided. The method includes generating the message, generating a first CRC for the message, generating a second CRC for the message, scrambling the first CRC by a first bit sequence of the message, and scrambling the second CRC by a second bit sequence of the message. The apparatus includes a message generator, a first CRC encoder, and a second CRC encoder. The message generator generates a message. The first CRC encoder generates a first CRC for the message, and scrambles the first CRC by a first bit sequence of the message. The second CRC encoder generates a second CRC for the message, and scrambles the second CRC by a second bit sequence of the message.

Abstract: Techniques are described that can be used to determine parameters of an adaptive Wiener filter to apply to a video region. The following parameters of the Wiener filter may be adjusted: coefficients, coefficient quantization, filter type, filter size, prediction mode, entropy encoding, and number of filter tables. The parameters associated with the lowest rate distortion cost of the encoder are selected for transmission with the encoded video. If not using adaptive Wiener filtering results in a lowest rate distortion cost, then adaptive Wiener filtering is not used for the video region. If using adaptive Wiener filtering results in a lowest rate distortion cost, then the parameters applied by the adaptive Wiener filtering that result in the lowest rate distortion cost are communicated with the filtered video region.

Abstract: A digital broadcasting transmission/reception system, and a signal processing method thereof for turbo-processing digital broadcasting transport stream and transmitting the processed stream, includes a parity area generating unit preparing a first area for parity insertion with respect to a dual transport stream (TS) which includes a normal stream and a turbo stream as multiplexed, a first interleaver interleaving the dual TS which is transmitted from the parity area generating unit, a turbo processing unit detecting the turbo stream from the interleaved dual TS, exclusively encoding the detected turbo stream for turbo-processing, and stuffing the encoded turbo stream into the dual TS, a deinterleaver deinterleaving the dual TS which is processed by the turbo processing unit, and a transmitting unit transmitting the dual TS which is processed at the deinterleaver.

Abstract: A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TRS encoder for to TRS-encode an MPEG-2 transmission stream having null data for inserting an SRS data and a TRS parity at predetermined positions, randomizer to input and randomize data stream from the TRS encoder, a SRS exchanger to replace the null data for inserting the SRS data to the known data, and an encoder for encoding a data streams to which the Known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization and further uses the TRS parity for correcting error of the received signal, so that the digital broadcasting reception performance can be improved at poor multipath channels.

Abstract: A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TRS encoder for to TRS-encode an MPEG-2 transmission stream having null data for inserting an SRS data and a TRS parity at predetermined positions, randomizer to input and randomize data stream from the TRS encoder, a SRS exchanger to replace the null data for inserting the SRS data to the known data, and an encoder for encoding a data streams to which the Known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization and further uses the TRS parity for correcting error of the received signal, so that the digital broadcasting reception performance can be improved at poor multipath channels.

Abstract: Frames of user interface (UI) graphical data can be remotely rendered more efficiently at a client during a remote session with a server by utilizing graphical data cached at the client to prevent re-sending data to the client that was sent in previous payloads. By using cache memory to remember recurring frames of similar UI data and delta encoding to correct areas that are not similar, encoded payload sizes are greatly reduced. When a cached frame is closer to a new frame than the current frame, the cached frame is selected and delta commands are derived from differences between the selected cache frame and the new frame. The differences between the cached frame and the new frame are then encoded as delta commands and the cache commands and delta commands are sent to the client which receives and applies the commands to render the new frame.

Abstract: A playback control section 5 obtains identification information (an extension) of compressed coded data recorded on a recording medium 1 or input information designating a decoding scheme from outside; tries decoding, unless the decoding performed in accordance with the identification information obtained or with the decoding scheme corresponding to the input information is carried out normally, with successively switching to other compatible decoding schemes; and performs playback based on the decoding scheme that enables normal decoding.

Abstract: A system for videoconferencing that offers, among other features, extremely low end-to-end delay as well as very high scalability. The system accommodates heterogeneous receivers and networks, as well as the best-effort nature of networks such as those based on the Internet Protocol. The system relies on scalable video coding to provide a coded representation of a source video signal at multiple temporal, quality, and spatial resolutions. These resolutions are represented by distinct bitstream components that are created at each end-user encoder. System architecture and processes called SVC Thinning allow the separation of data into data used for prediction in other pictures and data not used for prediction in other pictures. SVC Thinning processes, which can be performed at video conferencing endpoints or at MCUs, can selectively remove or replace with fewer bits the data not used for prediction in other pictures from transmitted bit streams.

Abstract: A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TRS encoder for to TRS-encode an MPEG-2 transmission stream having null data for inserting an SRS data and a TRS parity at predetermined positions, randomizer to input and randomize data stream from the TRS encoder, a SRS exchanger to replace the null data for inserting the SRS data to the known data, and an encoder for encoding a data streams to which the Known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization and further uses the TRS parity for correcting error of the received signal, so that the digital broadcasting reception performance can be improved at poor multipath channels.

Abstract: A 3D decoding apparatus according to the present invention includes: a decoding unit which decodes left-eye and right-eye code signals to generate left-eye and right-eye decode signals; an error determining unit which determines an error of the left-eye and the right-eye code signals; an output determining unit which determines, when there is an error in one of the left-eye and the right-eye code signals, whether the one of the code signals that is determined as including an error has an error data mount equal to or greater than a first threshold; and an output unit which outputs neither the left-eye nor the right-eye code signal when the error data amount is smaller than the first threshold, and outputs only the decode signal obtained by decoding the other of the code signals when the error data amount is equal to or greater than the first threshold.

Abstract: A method is provided in one example and includes receiving a video sequence having at least one code symbol embedded therein. The at least one code symbol is selected from a sequence of code symbols. The method further includes determining whether the at least one code symbol is decodable, and determining one or more video quality parameters based upon whether the at least one symbol is decodable. The method still further includes determining a video quality metric associated with the video sequence based upon the one or more video quality parameters.

Abstract: A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TRS encoder for to TRS-encode an MPEG-2 transmission stream having null data for inserting an SRS data and a TRS parity at predetermined positions, randomizer to input and randomize data stream from the TRS encoder, a SRS exchanger to replace the null data for inserting the SRS data to the known data, and an encoder for encoding a data streams to which the Known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization and further uses the TRS parity for correcting error of the received signal, so that the digital broadcasting reception performance can be improved at poor multipath channels.

Abstract: A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TRS encoder for to TRS-encode an MPEG-2 transmission stream having null data for inserting an SRS data and a TRS parity at predetermined positions, randomizer to input and randomize data stream from the TRS encoder, a SRS exchanger to replace the null data for inserting the SRS data to the known data, and an encoder for encoding a data streams to which the Known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization and further uses the TRS parity for correcting error of the received signal, so that the digital broadcasting reception performance can be improved at poor multipath channels.

Abstract: An apparatus generally including a first circuit and a second circuit is disclosed. The first circuit may be configured to generate an intermediate bitstream by parsing a Joint Picture Expert Group (JPEG) bitstream carrying a picture. The intermediate bitstream generally includes one or more encoded frames each representing a portion of the picture. The second circuit may be configured to (i) generate one or more intermediate images by decoding the encoded frames and (ii) recreate the picture using the intermediate images.

Abstract: An image is divided into blocks, and each of the blocks is categorized as a block of interest or a block of non-interest. In signal processing in a camera signal processing unit (9), a block of interest is controlled using a parameter given by a main control unit (22) such that a larger amount of high-frequency components are left than in a block of non-interest. A compression/decompression processing unit (19) allocates a large amount of codes to a block of interest to effectively suppress a deterioration of image quality in a region of interest. There is provided an image-sensing apparatus which can compress an image into a limited amount of codes such that any deterioration of image quality is unnoticeable.

Abstract: A media processor having a controller operable to recognize a portion of a video stream in an interactive television network having video compression artifacts corresponding to a stored model and perform model-based video correction of the portion recognized using synthetically generated images of objects in a captured video scene. Other embodiments are disclosed.

Abstract: An error recovery method may be engaged by an encoder to recover from misalignment between reference picture caches at the encoder and decoder. When a communication error is detected between a coder and a decoder, a number of non-acknowledged reference frames present in the decoder's reference picture cache may be estimated. Thereafter, frames may be coded as reference frames in a number greater or equal to the number of non-acknowledged reference frames that are estimated to be present in the decoder's reference picture cache. Thereafter, ordinary coding operations may resume. Typically, a final reference frame that is coded in the error recovery mode will be coded as a synchronization frame that has high coding quality. The coded reference frames that precede it may be coded at low quality (or may be coded as SKIP-coded frames).

Abstract: Adaptive error resilience for packet transmission over a network is provided. In one embodiment, a method comprises encoding a plurality of video packets using a first encoder into a set of encoded video packets, wherein the set of encoded video packets encapsulates the plurality of video packets using a first header; transmitting the set of encoded video packets; encoding the plurality of video packets using a second encoder into a set of repair packets, wherein the set of repair packets encapsulates at least a portion of the plurality of packets using a second header; and transmitting the set of repair packets.

Abstract: 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.

Abstract: According to a picture coding method, a coded picture is stored, as a reference picture, into a storage unit; commands indicating correspondence between reference pictures and reference indices for designating reference pictures and coefficients used for generation of predictive images are generated; a reference picture being used when motion compensation is performed on a current block in a current picture to be coded is designated by a reference index; a predictive image is generated by performing linear prediction on a block being obtained by motion estimation within the designated reference picture, by use of a coefficient corresponding to the reference index; a coded image signal including a coded signal obtained by coding a prediction error being a difference between the current block in the current picture to be coded and the predictive image, the commands, the reference index and the coefficient is outputted.

Abstract: The claimed subject matter provides systems and/or methods that facilitate describing, communicating, utilizing, etc. a frame dependency structure in connection with real time video communication. For example, a protocol can be employed to communicate the dependency structure from a sender to a receiver. Moreover, a mechanism on a receiver side can detect frame(s) that will be rendered with artifacts if displayed due to previous frame loss; this mechanism can leverage receiver side knowledge concerning the dependency structure of the frames.

Abstract: A method and apparatus for configuring a portable first cellular base station to operate in a digital cellular telecommunications network includes: placing the first cellular base station in the digital cellular telecommunications network; detecting with a radio receiver at least one second operating cellular base station within the digital cellular telecommunications network; demodulating a first transmission of the at least one second cellular base station transmitter to obtain a first data stream; predictively modifying the first data stream to create a modified first data stream; correlating at least one periodic portion of the modified first data stream to form an enhanced data signal; decoding the enhanced data signal to obtain information including at least the location area code for the at least one second operating cellular base station and a neighbor list of neighboring cellular base station scrambling codes; and configuring the first cellular base station to have the same scrambling code as one of

Abstract: For transmitting a sequence of video images on a network between a server and a client, that sequence being coded according to a hybrid predictive coding mode and comprising a plurality of images, each image being broken down into a plurality of macroblocks of pixels: the plurality of macroblocks is classified (E212) into at least two groups of macroblocks according to a predetermined criterion; these groups of macroblocks are completed (E216, E226) by additional macroblocks; at least two scalable coding levels are created (E214, E224) from these groups of macroblocks; unequal protection against transmission errors is applied (E218) to the groups of macroblocks based on the predetermined criterion; and the scalable coding levels are transmitted (E220) on the network.

Abstract: Provided is a method and apparatus for detecting errors generated by a DMB receiver by not processing received audio/video data in realtime. The error detection method includes: calculating a time required to process one frame obtained by dividing received data into frames having a predetermined size; and determining as an error a situation in which the calculated time exceeds time predetermined to process the one frame in realtime and transmitting an error recovering command. Accordingly, subsequent data frames can be normally processed by quickly detecting the error and recovering the error by initializing their associated modules.

Abstract: A method is provided in one example and includes receiving an input video, and identifying values of pixels from noise associated with a current video image within the video input. The method also includes creating a skip-reference video image associated with the identified pixel values, and comparing a portion of the current video image to the skip-reference video image. The method also includes determining a macroblock associated with the current video image to be skipped before an encoding operation occurs.

Abstract: One embodiment provides a method of performing packet identifier (PID) filtering of a digital video broadcasting-handheld (DVB-H) transport stream and includes processing a PID and a continuity counter (CC) sequence of the DVB-H transport stream, computing a number of mismatched bits between the PID and a desired PID, proceeding to a start of a reset state on a first-in-first-out (FIFO) queue of the DVB-H transport stream when a FIFO buffer becomes full, determining if a number of mismatched bits of a first packet in the FIFO buffer is less than a first threshold value, and proceeding to a start of a run algorithm state only if the number of mismatched bits of the first packet in the FIFO buffer is less than the first threshold value and if there is a valid CC sequence that includes the first packet.

Abstract: Methods, an apparatus, and a system for communications using multiplexed packets including payloads of the current and at least one preceding packet are disclosed. The invention is able to implement both robustness and a degree of compression while still being able to operate in environments of limited bandwidth having high rates of packet loss, such as in wireless VoIP networks.

Abstract: The present invention relates to computer-based systems and methods for visual signal extrapolation or interpolation based on statistic similarity estimation. Specifically, a first and a second reference pictures are provided, and motion estimation is conducted on the first and second reference pictures to generate motion vectors indicative of movement of at least one of the first and second reference pictures in relation to the other. Subsequently, an estimate picture is generated by extrapolation or interpolation from the first and/or the second reference picture using the motion vectors, followed by optional refinement of the estimate picture. Statistic similarity estimation is used either in motion estimation or in refining the estimate picture, or a combination of both, so as to provide improved visual signals.

Abstract: A method includes receiving a data signal that includes a plurality of encoded frames in a first access unit, receiving a data message indicative of a similarity between a portion of a first one of the plurality of encoded frames and a portion of a non-successive second one of the plurality of encoded frames in a second access unit, and decoding the portion of the second one of the plurality of encoded frames from the portion of the first one of the plurality of encoded frames when the data signal is corrupted.

Abstract: A method and apparatus for configuring a first cellular base station such as a femtocell to operate in a digital cellular telecommunications network includes: placing the first cellular base station in the digital cellular telecommunications network; detecting with a radio receiver at least one second operating cellular base station within the digital cellular telecommunications network; demodulating a first transmission of the at least one second cellular base station transmitter to obtain a first data stream; predictively modifying the first data stream to create a modified first data stream; correlating at least one periodic portion of the modified first data stream to form an enhanced data signal; decoding the enhanced data signal to obtain information; and configuring the first cellular base station with the information.

Abstract: Systems and methods are described for performing packet loss concealment (PLC) to mitigate the effect of one or more lost frames within a series of frames that represent a speech signal. In accordance with the exemplary systems and methods, PLC is performed by searching a codebook of speech-related parameter profiles to identify content that is being spoken and by selecting a profile associated with the identified content for use in predicting or estimating speech-related parameter information associated with one or more lost frames of a speech signal. The predicted/estimated speech-related parameter information is then used to synthesize one or more frames to replace the lost frame(s) of the speech signal.

Abstract: An image processing circuit includes a compression circuit, a plurality of first line buffers, a decompression circuit, and a motion estimation/compensation circuit. The compression circuit receives source image data and compresses the received source image data to generate a compressed image data. The first line buffers, coupled to the compression circuit, sequentially receive the compressed image data and buffer the compressed image data. The decompression circuit, coupled to the first line buffers, decompresses the compressed image data to generate a decompressed image data. The motion estimation/compression circuit, coupled to the decompression circuit, performs motion estimation/compensation according to the decompressed image data.

Abstract: A system for transmitting a transport stream including a robust stream is provided. The transmitting system includes an adaptor for, when receiving a first stream, making a space in the first stream to insert a second stream; a Reed-Solomon (RS) encoder for RS-encoding the input second stream; a Cyclic Redundancy Check (CRC) processor for converting the RS-encoded second stream to a stream comprising an added CRC bit sequence; and a stuffer for inserting the stream to the space in the first stream and outputting a transport stream. Hence, the robust stream can be efficiently transmitted.

Abstract: A channel equalizer includes a first transformer, an estimator, an average calculator, a second transformer, a coefficient calculator, a compensator, and a third transformer. The first transformer converts normal data into frequency domain data, where a known data sequence is periodically repeated in the normal data. The estimator estimates channel impulse responses (CIR) during known data intervals adjacent to each normal data block. The average calculator calculates an average value of the CIRs. The second transformer converts the average value into frequency domain data. The coefficient calculator calculates equalization coefficients using the average value, and the compensator compensates channel distortion of each normal data block using the coefficients. The third transformer converts the compensated data block into time domain data.

Abstract: A 3D decoding apparatus according to the present invention includes: a decoding unit which decodes left-eye and right-eye code signals to generate left-eye and right-eye decode signals; an error determining unit which determines an error of the left-eye and the right-eye code signals; an output determining unit which determines, when there is an error in one of the left-eye and the right-eye code signals, whether the one of the code signals that is determined as including an error has an error data mount equal to or greater than a first threshold; and an output unit which outputs neither the left-eye nor the right-eye code signal when the error data amount is smaller than the first threshold, and outputs only the decode signal obtained by decoding the other of the code signals when the error data amount is equal to or greater than the first threshold.

Abstract: According to one embodiment, an image processing apparatus includes an image block generator, a pixel extractor, a correction parameter calculator and a corrector. The image block generator enlarges an image block including a plurality of pixels to generate an enlarged image block. The pixel extractor extracts a maximum pixel with a maximum pixel value and a minimum pixel with a minimum pixel value from the image block. The correction parameter calculator calculates a correction parameter including a first difference and a second difference. The first difference is an absolute value of a difference between a sample pixel value of a sample pixel to be corrected in the enlarged image block and the maximum pixel value. The second difference is an absolute value of a difference between the sample pixel value and the minimum pixel value. The corrector corrects the enlarged image block using the correction parameter.

Abstract: A video processing method comprising receiving a video stream comprising a plurality of frames, removing via one or more non-binary artifact functions a plurality of artifact pixels from the video stream, and outputting the video stream with the artifact pixels removed.

Abstract: An exemplary method includes switching, by a media content access subsystem, from a program stream to an advertisement stream in response to a switching instruction received by the media content access subsystem, detecting, by the media content access subsystem, a predetermined number of markers included within the advertisement stream, the predetermined number of markers indicative of an error associated with the advertisement stream, and switching, by the media content access subsystem, from the advertisement stream to another media content stream in response to the detecting of the predetermined number of markers. Corresponding methods and systems are also disclosed.

Abstract: A system and method for monitoring a sequence of video packets for quantifying video quality includes a video picture monitor that accesses data in a header of a video packet included in the sequence of video packets. The header is separate from video content stored in the video packet. The video picture monitor also determines from the accessed data, a relationship between a portion of a picture included in the video packet and at least a portion of a picture included in another video packet. Both video packets are included in the sequence of video packets. This relationship indicates whether to use the video content stored in the first video packet to quantify video quality.

Abstract: An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame.

Abstract: An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame.

Abstract: Error resilient video coding schemes that may be employed at a transmitter or transcoder to limit error propagation at the receiver. Embodiments may include the use of Inhomogeneous Temporal Multiple Description Coding (ITMDC), cross-description error concealment, and cross-description reference picture reset (RPS) as well as homogeneous and inhomogeneous temporal/spatial MDC.

Abstract: The present system provides a method and apparatus for video compression of stationary scenes. These scenes may be taken by a fixed or temporarily fixed camera, such as, for example, a security camera. In theory, a stationary scene has a static background upon which objects move. However, due to environmental conditions, such as sun position, lighting changes, wind and weather, clouds, fog, and the like, the background is not consistently static. The system provides a dynamic and adaptive Scene Model to allow the subtraction of the static portions of a scene under a plurality of conditions, providing the bandwidth and storage capacity to record moving objects with higher fidelity at lower storage cost than prior art systems. In an alternate embodiment, the system uses Perceptual Filtering as a preliminary step to coding, significantly reducing the amount of data to be compressed at high fidelity.

Abstract: An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame.

Abstract: A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TRS encoder for to TRS-encode a MPEG-2 transmission stream having null data for inserting a Known data and a TRS parity at predetermined positions, randomizer to input and randomize data stream from the TRS encoder, a null packet exchanger to replace the null data for inserting the Known data to the known data, and an encoder for encoding a data streams to which the Known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization and further uses the TRS parity for correcting error of the received signal, so that the digital broadcasting reception performance can be improved at poor multipath channels.

Abstract: An apparatus and method for assessing image quality in real-time in consideration of both a coding error generated in an image processing process and a packet error generated in an image transmission process are provided. The apparatus for assessing image quality in real-time includes: an image quality measurement unit measuring image degradation generated in processing an image; a packet degradation detection unit detecting a packet error generated in transmitting the image; and final outcome drawing unit finally assessing the quality of the image in consideration of both a degradation degree of the image measured by the image quality measurement unit and the packet error measured by the packet degradation detection unit.