Abstract: Received communication signals may be decoded according to a combined, iterative inner code-outer code decoding technique. The inner code decoding is based on information produced by the outer code decoding.

Abstract: Received communication signals may be decoded according to a combined turbo-RS (Reed-Solomon) decoding technique. The turbo decoding is based on information produced by the RS decoding.

Abstract: Implementations relate to systems and methods for encoding block data to deliver content to a mobile wireless or other device. Content, such as audio, video or textual content, can be generated for broadcast in source blocks that are decomposed into a set of high priority blocks and a set of low priority blocks. Forward error correction is performed on the set of high priority blocks and set of low priority blocks to generate a set of repair symbols for use in reconstructing aggregate transmission blocks of content. The set of low priority blocks and set of repair symbols for a subsequent period can be shifted or inserted into an aggregate transmission block of a prior period. When a request to change channels is received, the decoding of the high priority block corresponding to the content of the new channel can begin before subsequent aggregate transmission blocks are received.

Abstract: A method of converting video data to film data may include deinterlacing video data from a first field and a third field to produce first field video data, providing second field video data, and merging the first field video data and the second field video data to produce first frame video data. The method may further include copying video data from a fourth field and a fifth field to produce second frame video data. An apparatus for converting video data to film data may include a first deinterlacer for deinterlacing video data from a first field and a third field to produce first field video data and a copy module for providing second field video data and merging the first field video data and the second field video data to produce first frame video data.

Abstract: A method of acquiring a forward link only (FLO) network in a radio frequency (RF) in a wireless communication environment, includes selecting a RF from a first list; selecting a signal parameter (SP) from a second list; determining if a first parameter is found using the selected RF and SP; and, upon determination that the first parameter is found, enabling the use of the selected RF and SP to communicate in the FLO network. An apparatus for implementing the method is also disclosed.

Abstract: Embodiments include systems and methods of improving processing in a decoder in a multimedia transmission system. Multimedia data may include one or more of motion video, audio, still images, or any other suitable type of audio-visual data. One embodiment includes a system and method of parsing fixed and variable length codes from a bit-wise stream of multi-media data by maintaining and reading the data in a processor aligned (e.g., word aligned) way. Another embodiment includes a system and method of decoding variable length codes, particular as received from such a variable length code using multiple levels of decoding tables to speed up decoder table lookup.

Abstract: An acquisition module includes a coherent correlator configured to receive a transmission having a pilot signal and correlate the received transmission with a local copy of the pilot signal to produce a first output, a delayed correlator configured to delay the first output and correlate the first output with the delayed first output to produce a second output, and a detector configured to detect the pilot signal in the transmission based on the second output.

Abstract: An OFDM telecommunications system includes a transmitter and a receiver. The receiver includes a canceller configured to reduce inter-carrier interference (ICI) in an OFDM symbol in the frequency domain.

Abstract: The invention generally relates to multimedia data processing, and more particularly, to processing operations performed prior to or in conjunction with data compression processing. A method of processing multimedia data includes receiving Interlaced video frames, obtaining metadata for the interlaced video frames, converting the interlaced video frames to progressive video using at least a portion of the metadata; and providing the progressive video and at least a portion of the metadata to an encoder for use in encoding the progressive video. The method can also include generating spatial information and bi-directional motion information, for the interlaced video frames, and generating progressive video based on the interlaced video frames using the spatial and bi-directional motion information.

Abstract: Methods and apparatus for efficient encoding multimedia data, such as live video streams are disclosed. The multimedia data is pre-encoded into multiple layers and characteristics of the pre-encoded data are determined. Based at least in part on the determined characteristics, the multimedia data is encoded into multiple layers.

Abstract: Aspects include systems and methods of improving processing in an encoder in a multimedia transmission system. Multimedia data may include one or more of motion video, audio, still images, or any other suitable type of audio-visual data. Aspects include an apparatus and method of encoding video data. For example, an apparatus and method of reduced reference frame search in video encoding is disclosed.

Abstract: This disclosure describes techniques for video coding rate adaptation to reduce packetization overhead. The video coding rate controls the number of coding bits allocated to a segment of encoded video, and hence the length of the encoded video segment. Differences between the length of the encoded video segment and the cumulative length of a series of packets used to encode the video segment result in unused packet space within the last packet in the series. This unused packet space is typically filled with padding bits. In accordance with the disclosure, the video coding rate is adjusted for a segment of digital video so that the encoded video more closely fits within the series of packets, thereby reducing the number of padding bits required by the last packet.

Abstract: This disclosure describes adaptive video encoding and decoding techniques for encoder-assisted frame rate up-conversion (EA-FRUC). An encoder selectively encodes at least a portion of a video frame, such as a block, using an interpolated FRUC frame as a reference. The encoder interpolates at least a portion of the FRUC frame at the same time instance as the yet to be encoded video frame, and selects one of a plurality of FRUC encoding modes for that portion, e.g., based on rate distortion (RD). The encoder encodes the frame using the selected FRUC encoding mode, the FRUC reference frame, and any additional reference frames that may be indicated. A decoder interpolates the FRUC frame and uses it or decoding with knowledge of the particular FRUC mode that was used by the encoder. The encoder communicates the FRUC mode for a block via one or more existing parameters in the encoded video frame.

Abstract: In general, this disclosure describes video processing techniques that make use of syntax elements and semantics to support low complexity extensions for multimedia processing with video scalability. The syntax elements and semantics may be added to network abstraction layer (NAL) units and may be especially applicable to multimedia broadcasting, and define a bitstream format and encoding process that support low complexity video scalability. In some aspects, the techniques may be applied to implement low complexity video scalability extensions for devices that otherwise conform to the H.264 standard. For example, the syntax element and semantics may be applicable to NAL units conforming to the H.264 standard.

Abstract: Embodiments include systems and methods of improving processing in a decoder in a multimedia transmission system. Multimedia data may include one or more of motion video, audio, still images, or any other suitable type of audio-visual data. One embodiment includes a system and method of parsing fixed and variable length codes from a bit-wise stream of multi-media data by maintaining and reading the data in a processor aligned (e.g., word aligned) way. Another embodiment includes a system and method of decoding variable length codes, particular as received from such a variable length code using multiple levels of decoding tables to speed up decoder table lookup.

Abstract: Embodiments include systems and methods of improving processing in a decoder in a multimedia transmission system. Multimedia data may include one or more of motion video, audio, still images, or any other suitable type of audio-visual data. One embodiment includes a system and method of parsing fixed and variable length codes from a bit-wise stream of multi-media data by maintaining and reading the data in a processor aligned (e.g., word aligned) way. Another embodiment includes a system and method of decoding variable length codes, particular as received from such a variable length code using multiple levels of decoding tables to speed up decoder table lookup.

Abstract: The invention comprises devices and methods for processing multimedia data to generate progressive frame data from interlaced frame data. In one aspect, a method of processing multimedia data includes generating spatio-temporal information for a selected frame of interlaced multimedia data, generating motion information for the selected frame, and deinterlacing fields of the selected frame based on the spatio-temporal information and the motion information to form a progressive frame associated with the selected frame. In another aspect an apparatus for processing multimedia data can include a spatial filter module configured to generate spatio-temporal information of a selected frame of interlaced multimedia data, a motion estimator configured to generate motion information for the selected frame, and a deinterlacer configured to deinterlace fields of the selected frame and form a progressive frame corresponding to the selected frame based on the spatio-temporal information and the motion information.

Abstract: Methods and apparatus for frequency tracking of a received signal. In an aspect, a method is provided wherein the received signal comprises one or more symbols having a periodic structure. The method comprises receiving a plurality of samples of a selected symbol that comprises pilot signals scrambled with data and determining a window size and a periodicity factor. The method also comprises accumulating a correlation between samples in a first window and samples in a second window to produce an accumulated correlation value, wherein the first and second windows have a size and a separation based on the window size and the periodicity factor, respectively, and deriving a frequency error estimate based on the accumulated correlation value.

Abstract: This system adaptively assigns picture types used for temporal compression to frames of streaming video at the input. Based on threshold testing of two metrics that are measures of distance between the frames at the input, a frame may be assigned to be compressed as an I, P, or B frame or be skipped over by the system without being coded at all.

Abstract: A technique for processing video to determine which segments of video originate in a telecine and which conform to the NTSC standard is described herein. The current pull-down phase of the 3:2 pull-down (see below) in a telecine generated video segment is estimated and used to invert the telecine process.