Matsushita Electric Industrial Co., Ltd.

Matsushita Electric Corporation of America

Panasonic Corporation

Wanrong Lin

Dennis Bushmitch

Yao Rong Wang

David Alan Braun

Anton Margoline

Alan Kaplan

Raghuraman Mudumbai

An improved services gateway environment is provided within a gateway framework. The improvement comprising a SIP service architecture that enables SIP entities to register with itself and translates such registrations into gateway aware registrations.

SIP service for home network device and service mobility

In a video encoder/decoder, a method processes a discrete cosine transform (DCT) block of coefficients. The method receives a DCT block of coefficients, and linearizes the DCT block of coefficients into a one dimensional array of sequentially arranged coefficients. The method stores a portion of the one dimensional array of coefficients in a register, the portion including at least two sequentially arranged coefficients. The stored portion of coefficients in the register is processed. A next portion of coefficients in the one dimensional array is processed. This is repeated until the entire DCT block of coefficients have been loaded into the register. The processing may include computing a run length value, finding a class number, or determining dequantized coefficients of a DCT block.

Single-instruction multiple-data (SIMD)-based algorithms for processing video data

An apparatus and method for performing bitplane coding with reordering, that may be used in a Fine Granularity Scalability (FGS) system. The apparatus and method reorder coefficients each time after a bitplane is coded. By reordering, the apparatus and method separate the coefficients into two groups. When coding a bitplane, bits in the first group are copied into the bitstream, while the bits in the second group are subject to common run-length, VLC, or arithmetic coding. The apparatus and method may also be used with or in a conventional SNR, temporal and/or spatially scalable architectures, for example, as utilized within an MPEG-4 framework.

Apparatus and method for performing bitplane coding with reordering in a fine granularity scalability coding system

Error resilient methods and apparatus for coding, transmitting and/or storing digital multimedia data are disclosed. Digital multimedia data is organized into channel blocks, which include columns of data. A priority is determined for each channel block, based on the data within the channel block. Different forward error correction (FEC) procedures may be selected for the channel blocks based on their priority. Also, channel blocks may be transmitted on different transmission channels, and/or stored on different storage elements, based on their priority. Also disclosed is the coding, as pre-interleaved channel blocks, of digital multimedia data having fixed-length segments. The fixed-length segments are ordered and arranged in pre-interleaved channel blocks containing rows and columns. Pre-interleaving of a channel block arranges consecutive fixed-length segments along its columns. FEC data is determined for each row and included in the channel block. The channel blocks are packetized along the columns.

Error resilient coding, storage, and transmission of digital multimedia data

A method is provided for transcoding between video signals in two standards, DV and MPEG-2, each standard including discrete cosine transform (DCT) compressed signals. The each of the signals have macroblocks containing a plurality of DCT blocks. The DCT blocks are quantized according to respective quantization methods defined by the standards. The coefficients in each block are zigzag scanned, run-length coded and variable-length coded. The process variable-length decodes the coefficients and translates the quantized coefficients in the DV standard into quantized coefficients in the MPEG standard without fully dequantizing at least some of the DV coefficients and without performing an inverse DCT operation on any of the DCT coefficients. DV blocks that are encoded in a 248 format are translated into an 88 format before they are converted to MPEG-2 blocks. A method for transcoding from MPEG-2 to DV is also described. The MPEG-2 signals are intra-frame encoded, have a 4:2:2 chrominance format and an 88 frame-encoded block format. According to this method, converted 88 DV blocks that represent significant intra-field motion are converted from the 88 format to a 248 format. The method also controls which overflow coefficients in the DV signal are transcoded into corresponding coefficients in the MPEG-2 signal to control the data rate of the MPEG-2 signal.

System and associated method for transcoding discrete cosine transform coded signals

A simple and efficient scheme is used to predict the number of bits needed to block of discrete cosine transform (DCT) coefficients with variable length coding (VLC). The scheme defines an easily computable parameter that has a strong correlation with the number of bits needed to encode the DCT data. Then a second order polynomial is developed to approximate the correlation and is used to predict the number of VLC bits that will be produced if a corresponding quantization matrix is used. The approach can be used to streamline the encoding/transcoding process for DV, and the result on that is presented. A further feature is the ability to present multiple results for multiple quantization matrixes.

Growing community of inventors

Plainsboro, NJ, United States of America

Wanrong Lin