213 results about "Parallel encoding" patented technology

There are provided apparatus and methods for parallelizing an encoding process across multiple processors. An apparatus includes a computing resource balancer and a splitter. The computing resource balancer is for assigning encoder instances to respective ones of the multiple processors based on at least one of thread affinity and process affinity. The splitter is for temporally dividing an incoming video sequence into discrete GOPs such that each of the encoder instances is capable of encoding the incoming video sequence in parallel so that each of the discrete GOPs is encoded on a respective one of the multiple processors.

A Single Carrier Block Transmission (SCBT) system employs an inherently parallel approach to error correction processing. At the transmission system (200), an incoming data stream is split (210) into P parallel data streams, each having a data rate equal to a fraction of the incoming data stream's data rate. The parallel data streams are then each separately encoded (220) in P parallel encoding processes (beneficially, using P parallel encoders (222)). The P separately encoded data streams are then merged (330), interleaved (320), and mapped (310) into a single stream of encoded symbols, which are transmitted to the receiver using an arbitrary modulation (240) and transmission scheme. At the receiver (255), the received data stream is de-interleaved (350) and split into P encoded data streams, which are then decoded (285) using P parallel decoders. Then, the decoded data streams are combined or multiplexed (295) into a single data stream.

The invention discloses a system for realizing high-definition video parallel coding, which includes a image segmentation module, a subcode stream merge module, a storage module, a video modulus conversion module and several image coding modules; the video modulus conversion module is connected with at least one image coding module; the image coding module is connected with the image segmentation module and the storage module; the image segmentation module divides the current image into several sub-images; the image coding module independently encodes and compresses the divided sub-images to create subcode stream; the subcode stream merge module subsequently merges the sub-images to create and output coding stream of the current image. The method of dividing the coded image into sub-images for parallel coding of the invention avoids problem of flow bottleneck caused by over-load of some module in prior parallel method based on module flow, which can flexibly distribute sub-images with appropriate size according to processing capacity of target processor and keep high-parallelism of multiple processors, thereby upgrading performance of the whole system.

A system encoding and decoding video that uses a parallel encoding and decoding technique.

Encoding and decoding systems for MPEG encoding and decoding at a high speed using a parallel processing system, wherein macroblocks to be processed are designated for first to third processors which are made to carry out all processings of encoding, variable length coding, and local decoding of those macroblocks; the variable length coding is carried out after confirming that the variable length coding with respect to the previous macroblock is ended; the variable length coding which was normally sequentially carried out at a specific processor is carried out at all of the processors; and the encoding and local decoding are carried out at all of the processors; whereby the loads are dispersed, the efficiency is improved as a whole, and the processing speed becomes fast.

The invention discloses a parallel encoding realization circuit and an encoding method based on CABAC (Context-based Adaptive Binary Arithmetic Coding) in H.264 / AVC (Advanced Video Coding). The parallel encoding realization circuit comprises a binary engine, a context model engine, a parallel normalization engine and an RBSP (Remote Batch Station Processor) code stream generation engine, wherein the binary engine is used for executing a parallel normalization operation; the context model engine is used for executing context read and updating operation of two bits per period; the parallel normalization engine is used for executing the normalization operation of two bits per period; and the RBSP is used for generating an RBSP output code stream. The binary engine and the context model engine are connected in a three-writing, two-reading and first-in, first-out queue; and the parallel normalization engine and the RBSP code stream generation engine are connected in a two-writing, one-reading and first-in, first-out queue. The invention ensures that processing speeds of the binary engine, the normalization engine and the RBSP code stream generation engine are matched, avoids productionline stagnancy and solves the problems of unbalanced throughput rates among various levels of processing engines and calculation bottleneck initiated by correlation of a coding interval, coding lowerlimit normalization and a code stream production process.

A system encoding and decoding video that uses a parallel encoding and decoding technique.

The invention discloses a multi-user network coding communication method with a high speed parallel encoding and decoding structure, which comprises the following steps: in a wireless relay network, multiple accessed user information is integrally interweaved by a relay node, serial / parallel conversion is carried out on the interweaved sequence, multiple groups of converted parallel data are input to a high speed parallel encoder to be encoded, and finally encoded data is broadcasted, thus realizing network encoding. A base station carries out teration decoding by means of a combined network-channel decoder according to original data broadcasted by users and data obtained by network encoding and channel encoding and forwarded by the relay node to obtain the original information of the users. The decoder of the base station comprises two parallel decoder groups, i.e. a user decoder group and a relay decoder group; iteration decoding is realized through transmitting soft information between two parallel decoder groups, thus not only recovering the original information of all accessed users but also improving decoding reliability and reducing decoding time delay. By adopting the method, the relay uplink transmission efficiency and the quality of transmission signal are improved.

The invention relates to the communications field and provides parallel encoding device and a method for a low density parity-check code (LDPC). By adopting the practice of step-by-step encoding combined with the serial-parallel approach, a concatenated encoding scheme with linear complexity combining with pre-encoding and parallel convolution coding structures is provided thereby. The encoding device for realizing the encoding scheme mainly comprises an information storage unit, a pre-encoding unit and an encoding unit (comprising a data distribution unit and a convolution coding unit) as well as a v (0) verification bit generating unit. The encoding device of the invention adopts a circular shift register and a model 2 adder, which is easy to realize and avoid multiplication operation of vector and matrix. Complexity of the encoding device is reduced. The encoding device provided by the invention features good expansibility. A plurality of basic encoders are used for parallel encoding so that encoding efficiency can be improved by many times compared with the single basic encoding device. Therefore, when hardware complexity permits, parallel structures can be applied as much as possible, which greatly improves encoding efficiency.

A concatenated encoder capable of coding multiple data bits in parallel and including a first (outer) encoder, a memory, and a second (inner) encoder coupled in cascade. The first encoder receives and codes M data bits in parallel in accordance with a first coding scheme to generate MR code bits. The memory receives and stores unpunctured ones of the MR code bits from the first encoder. The second encoder receives and codes N code bits in parallel in accordance with a second coding scheme to generate coded data. M and N can be any values (e.g., M>=8, N>=4). Each encoder can be a (e.g., a rate ½) convolutional encoder that implements a particular polynomial generator, and can be implemented with one or more look-up tables, a state machine, or some other design.

A CRC encoding circuit for generating CRC bits in accordance with initial parallel data having remainder portion data in a last column of the initial parallel data. A first parallel encoding unit is included for generating first CRC bits in accordance with the initial parallel data other than the remainder portion data. A CRC bits selector selects second CRC bits having predetermined number of bytes, from the first CRC bits generated by the first parallel encoding unit. A parallel data selector selects second parallel data having the same number of bytes as the second CRC bits, from the remainder portion data. A second parallel encoding unit generates third CRC bits in accordance with the second CRC bits and the second parallel data

A system encoding and decoding video that uses a parallel encoding and decoding technique.

Precoders and their corresponding logic schemes, together with a method of using the precoders and their schemes to generate a media code sequence of symbols for data storage channels, with partial response equalization and a multilevel encoding / modulation scheme. Partial responses are defined by the classical and modified target polynomials, while the multilevel encoding / modulation schemes include: 1) Structured Set Partitions (SSP), 2) a set of conventional block codes with different error correcting capabilities, and 3) a variety of iterative decoding such as the List Trellis Decoder (LTD), the BCJR algorithm, and soft decoding of low-density parity check codes. The precoders are derived from the SSP's, and combined with conventional ECC encoders designed for error detection, or error correction, or both. A cascade of parallel ECC encoders, followed by an SSP precoder, increases the minimum Euclidean distance between different media code sequences of symbols, and as a result gives lower bit error rates after decoding.

An information processing apparatus for encoding a baseband signal, the information processing apparatus includes: a data splitting block; an encoder; a control block; and a splicing block. The data splitting block is configured to acquire the baseband signal before splitting it into predetermined encoding sections. The encoder is configured to generate encoded streams by parallelly encoding a continuous plurality of the encoding sections acquired by the data splitting block from the baseband signal. The control block is configured to control the encoder to perform the parallel encoding in a manner subject to predetermined constraints. The splicing block is configured to splice the encoded streams generated by the encoder.

Incoming decoded data (1), for example from an H264 decoder, is fed to an encoder unit (2) that entropy encodes the decoded data using a parallel encoding scheme that includes context-based arithmetic encoding. The syntax is chosen so that the context does not depend on the immediately previously encoded symbol. The output of the encoder (2) is fed to a FIFO memory whose output is fed to a complimentary decoder (4) whose output produces a delayed copy of the incoming decoded data (1).

An apparatus and method for encoding a moving picture. Since the apparatus includes a plurality of central processing units (CPUs), the apparatus may perform parallel encoding even for a H.264 video encoder having high complexity. In particular, since the apparatus still uses information about blocks around a macroblock even at a boundary of a slice, the apparatus may improve the efficiency of a video codec.

System and method are provided for optimally encoding a sequence of video frames using image statistics collected from multiple encoders connected in parallel, each encoder employing a different set of encode parameters. The image statistics are used to select an optimum set of encode parameters for use in encoding the sequence of video frames in a subsequent encode subsystem stage. As an alternative, multiple buffers are connected to the outputs of the multiple, parallel connected encoders, with the encoded stream from the encoder employing the optimum set of encode parameters selected for output as the bitstream of encoded video data.

A system encoding and decoding video that uses a parallel encoding and decoding technique.

A decoder, encoder and corresponding system are disclosed for providing fast Forward Error Correcting (FEC) decoding and encoding of syndrome-based error correcting codes. Three-parallel processing is performed by elements of the system. More particularly, in an illustrative embodiment, a decoder performs three-parallel syndrome generation and error determination and calculations, and an encoder performs three-parallel encoding. Low power and complexity techniques are used to save cost and power yet provide relatively high speed encoding and decoding.

This image decoding device (100), which appropriately executes parallel encoding processing by a simple configuration, is provided with: a stream dividing control unit (140) that designates a region to be processed, and selects a portion of a divided stream on the basis of the disposition of the region to be processed; M stream dividing units (130) that generate MN divided streams by means of executing stream dividing processing in parallel with respect to M designated regions to be processed; and N decoding engines (120) that, in parallel, decode a portion of each of N divided streams that contain the selected portion. For each divided stream, the stream dividing units (130) reconfigure, as a new slice, a slice portion group comprising at least one slice portion allocated to the divided stream when a slice contained in the region to be processed is divided into a plurality of slice portions which are allocated to a plurality of divided streams.

Methods and apparatus for spreading and concentrating information to constant-weight encode of data words on a parallel data line bus while allowing communication of information across sub-word paths. In one embodiment, data transfer rates previously obtained only with differential architectures are achieved by only a small increase in line count above single ended architectures. For example, an 18-bit data word requires 22 encoded data lines for transmission, where previously, 16 and 32 lines would be required to transmit un-coded data with single-ended and differential architectures respectively. Constant-weight parallel encoding maintains constant current in the parallel-encoded data lines and the high and low potential driver circuits for the signal lines.

A system encoding and decoding video that uses a parallel encoding and decoding technique.

Parallel coding of digital pictures is described. A digital picture is divided into two or more vertical sections. Two or more corresponding Stage 1 encoder units can perform a first stage of entropy coding on the two or more vertical sections on a row-by-row basis. The entropy coding of the vertical sections can be performed in parallel such that each Stage 1 encoder unit performs entropy coding on its respective vertical section and returns a partially coded Stage 1 output to a Stage 2 encoder unit. Each partially coded Stage 1 output includes a representation of data for a corresponding vertical section that has been compressed by a compression factor greater than 1. The Stage 2 encoder unit can generate a final coded bitstream from the partially encoded Stage 1 output as a Stage 2 output.

The differential value of the adjacent pixels is calculated firstly and is coded by a VLC coding. The VLC coding includes codes representing the Quotient and Remainder with a marker bit inserted in between. The divider is predicted with no code in the coded data stream. If three pixel components are presented in the same clock time, three VLC encoders and three VLD decoders are applied to encode and decode one pixel at a time. During encoding, both Remainder and Quotient of the same pixel component are encoded in parallel followed. During decoding, both Remainder and Quotient of the same pixel component are decoded in parallel and the results of the first pixel component are used a reference to decode the second pixel component which adopts the same decoding procedure and the decoded results of the second pixel component is used as reference to decode the third pixel component.

The invention discloses an FPGA implementation method and apparatus of a universal quasi-cyclic LDPC code encoder. According to the method disclosed by the invention, compromised quantitative calculation is performed according to the requirements of the number of cyclic blocks of a non-unit matrix portion of a generated matrix, the dimensionality of the cyclic block, a code length, a code rate, asystem clock and an encoding rate, so as to figure out the parallelism of a part of parallel encoding modules. The method not only has computational and configuration versatility, but also achieves good compromise between the coding rate and the number of consumed resources, thereby overcoming the problems that the encoding rate of a serial input encoder is too low, too many resources are consumedby a fully parallel input encoding circuit, it is not conducive to the reasonable use of the resources, and that the logic connection of a two-step encoding circuit is complicated.