197results about How to "Improve codec efficiency" patented technology

A method is provided. The method includes: determining one or more first candidate reference blocks that correspond to a current block in a first reference frame according to known motion information related to the current block; determining one or more second candidate reference blocks in a second reference frame; calculating a sum of differences between pixels of each of the one or more first candidate reference blocks and pixels of a second candidate reference block that is of the one or more second candidate reference blocks and that corresponds to the first candidate reference block; selecting a first candidate reference block and a second candidate reference block with a minimum sum of differences as a first reference block and a second reference block of the current block; and obtaining motion information of the current block according to motion information determined by the first reference block and the second reference block.

The invention relates to a multi-video coding and decoding method and a device. The method mainly comprises the following steps that: firstly, the reference distance between a reference image and a current image is determined according to the time distance and the space distance between the reference image and the current image; a reference image with at least one frame adopted by the current image is chosen and determined according to a reference distance of each candidate reference image and the reference image is adopted to code and decode the current image. Therefore, the invention can realize the optimal predicting effect by adopting the image in a current reference cache under the circumstance that an additional reference cache is not necessary, thereby raising the multi-video coding and decoding efficiency.

This invention discloses a method for selecting interframe prediction mode in video image interframe prediction coding process, which contains dividing video image sequence into different area according to different attribute, limiting the selectable interframe prediction mode of each image according to the block scale distribution property of different image area, selecting corresponded interframe prediction mode and coding in limited interframe prediction mode for each macro block in each image area. Said invention simplifies the selection process and raises efficiency and communication effect.

An exemplary embodiment of the invention relates to a method of using pattern vectors for image coding and decoding. The method comprises converting a block of image data into a set of transform coefficients, quantizing the transform coefficients such that a number of the coefficients become zero, constructing a single entity or bit vector indicating which coefficients are non-zero, coding the single entity or bit vector as an integer using an adaptive, semi-adaptive or non-adaptive arithmetic coder, coding the values of the coefficients in any fixed order, using an adaptive, semi-adaptive or non-adaptive arithmetic coder, or some other coder, and coding all coefficients except the zero coefficients. The system and method of decoding data relate to the corresponding hardware and process steps performed by the decoder when decoding a bitstream coded as described herein.

Disclosed is a method and apparatus for de-blocking filtering of video data. The method includes performing Integer Transform (IT) of an input data block, scaling the data block, which has been IT-ed and indicates a frequency domain, by applying a modified scaling matrix in which a high frequency area is set to 0, performing Inverse Integer Transform (IIT) on the scaled block.

The invention discloses a coding method, a coder, a decoding method and a decoder for multi-channel audio and belongs to the technical field of audio processing. The coding method for multi-channel audio includes steps of acquiring predicated parameters by performing linear predication on surround channel signals according to main channel signals and adding the predicated parameters to a coding code stream, or acquiring predicated parameters by predicating the surround channel signals according to the main channel signals and transmission functions and adding the predicated parameters to the coding code stream; and judging whether the surround channel signals relate to center channel signals or not, or judging whether the surround channel signals relate to left main channel signals and right main channel signals or not, and if so, then coding the predicated parameters, the main channel signals and the judging information of relevance. The invention further discloses a coder, a decoding method and a decoder for multi-channel audio. By aids of the coding method, the coder, the decoding method and the decoder for multi-channel audio, coding and decoding performances are improved, and output replay channels can be changed at a decoding terminal adaptively.

The invention provides a Wiener filtering speech enhancement method for multi-taper spectrum estimation of a pickup. The Wiener filtering speech enhancement method is characterized by including: performing multi-taper spectrum estimation on a noisy speech, and removing noise items through a wavelet threshold value to obtain speech spectra which are approximately pure; comparing the speech spectra with a speech spectrum processed through Wiener filtering, and selecting corresponding spectra as finally enhanced speech spectra according to different distortion types. When the method is applied in the pickup, compared with existing mean square forecast error and pre-whitening subspace methods, the method is smoother in speech and closer to pure speech; in circumstances with low signal-to-noise ratio and complex noise, the pickup is higher in speech processing speed, higher in coding and decoding efficiency, better in denoising performance and higher in robustness. In addition, in environments with long distance, the pickup has good speech recognition effect.

The present invention discloses abstract syntax rule descriptive communication protocol implementation method and device, to realize abstract syntax rule descriptive communication protocol and high efficiency to realize protocol coding decoding; furthermore also supporting user configuring data structure, supporting protocol specification adjusting, supporting error detection and process, and supporting user configuring operation processing. The present invention generates relevant specially realizing code and data structure to each kind communication protocol abstract syntax rule description, capable of directly compiling or explaining operation in communication entity; according to depth-first principle traversing syntax tree, parallel processing user configuring information, to generate node logical relationship fit data structure and realizing code; in advance establishing elementary data type process code library, directly taking for generating simple joint realizing code.

The invention discloses a first-order difference prefix notation coding method for the lossless compression of image data, which comprises the following steps of: 1, pre-processing original image data to obtain first-order differences between adjacent pixel values; 2, counting the probabilities of occurrence of each first-order difference, and re-sequencing the first-order differences from higher probabilities to lower probabilities to obtain new first-order differences; 3, performing first-order difference prefix notation coding processing on the new first-order differences obtained by the step 2 to obtain a prefix code table and a suffix code table; 4, performing order-reduction processing on suffix codes in the step 3 by adopting a suffix derivation method; and 5, performing coding processing on primary prefix codes in the step 4 according to bit planes by adopting dichotomy. The method ensures relatively lower computational complexity, simple coding, high coding and decoding efficiency remarkably higher than that of JPEG2000, and no need of adopting special compression and decompression chips, and compared with a conventional lossless compression algorithm, remarkably increases a compression ratio to be equivalent to that of the international standard JPEG2000.

The invention relates to a video encoding method and decoding method as well as an encoding and decoding device. The encoding method comprises the following steps of: generating a double predicting mark symbol for an encoding block; generating the double predicting mark symbol for at least one sub-block of the encoding block when the encoding block needs to carry out double prediction, wherein the double predicting mark symbol of the sub-block is used for indicating whether the sub-block carries out the double prediction or not; predicting according to the double predicting mark symbol of theencoding block and the double predicting mark symbol of at least one sub-block of the encoding block to acquire a predicting image; and acquiring a predicting residual error according to the predicting image and encoding the predicting residual error. A unit which is subjected to the double prediction and marked by the double predicting mark symbol is thinned to be a sub-block grade so as to improve the encoding efficiency.

A use method of a communication coding-decoding assembly of an android system relates to the technical field of data processing technique of the android system. The use method comprises the following steps: a step S1, compiling an assembly of an OpenMax integrated layer and an assembly client of the OpenMax integrated layer, wherein the assembly client can call an assembly, and furthermore a hardware coder-decoder of an OpenMax developing layer is called through the assembly client; a step S2, creating a flow media hardware coding-decoding plug-in and packaging an interface of the assembly client; and a step S3, writing the information of the hardware coder-decoder into a configuration file, selecting the flow media hardware coding-decoding plug-in by an upper-layer application through the configuration file, calling the interface of the assembly client and furthermore calling the interface of the assembly, and finally calling the hardware coder-decoder. According to the use method, the hardware coder-decoder is utilized, thereby improving coding efficiency and decoding efficiency, and therefore better user experience is realized.

The invention provides an H.264 or H.265-based foreground and background coding scheme, including a step of performing foreground and background separation of one frame of image; a step of determining whether to code a separated background; a step of coding a to-be-coded background based on an intraframe coding mode, an interframe coding mode or an interframe strip coding mode of H.264 or H.265; a step of coding a separated foreground based on a strip coding mode of H.264 or H.265; and a step of sending code streams of a coded foreground and a coded background. The to-be-coded background is subjected to coding based on coding modes of H.264 or H.265, and the to-be-coded background is subjected to differentiation coding based on the intraframe coding mode, the interframe coding mode or the interframe strip coding mode of H.264 or H.265 respectively, so that compared with other coding technologies, the coding scheme provided by the invention can greatly improve the video coding efficiency, save the network bandwidth and reduce the storage resource.

The invention discloses a method for realizing SIP (session initiation protocol) universal encoding and decoding. The method for realizing SIP (session initiation protocol) universal encoding and decoding comprises the following steps of: describing a single protocol rule by using a regular expression; compiling the protocol rule into a configuration file; acquiring an encoding and decoding rule through reading information in the configuration file, and when the protocol is extended, only modifying the configuration file; and in the process of encoding and decoding a message, describing field information required to be encoded and decoded in the current application through the configuration file without carrying out encoding and decoding on the whole message. In addition, the invention also discloses a device for realizing SIP universal encoding and decoding. Through the method and device disclosed by the invention, the support on a protocol can be realized through extending a configuration file of the protocol on the basis of not modifying a program, thereby improving the efficiency of encoding and decoding.

The invention discloses a coding and decoding method, a communication system and an apparatus for improving the efficiency of the coding and decoding. The method comprises: acquiring the data deblock to be transmitted, wherein the data deblock to be transmitted is composed of an initial data deblock and a second data deblock; acquiring a first coding coefficient of the initial data deblock; computing a second coding coefficient of the second data deblock based on the first coding coefficient and the preset coding and decoding regulation; coding the data deblock to be transmitted based on the first coding coefficient and the second first coding coefficient and acquiring the coding data block; transmitting the coding data block. The invention also provides a communication system and the correlated apparatuses. The invention may effectively improve the coding efficiency.

The invention discloses a DNA information storage method based on Raptor codes and quaternion RS codes. The method comprises a DNA information storage process based on Raptor codes. The DNA information storage process comprises the following steps: 1, converting an information file needing to be stored into a binary code stream; 2, encoding the binary code stream into a base sequence containing A,T, C and G by using Raptor codes; and 3, adding a quaternary RS error correction mechanism to the base sequences to ensure the correctness of information storage, then adding primer segments requiredfor synthesizing DNA to the two ends of the base sequences, and synthesizing the base sequences into DNA chains by using a biotechnology to complete information storage; compared with the prior art,the DNA storage technology realized by the invention has the beneficial effects of good ductility, high encoding and decoding efficiency, low complexity and the like.

The invention discloses a network protocol format based on visible characters, and an encoding and decoding method and system thereof, and relates to the technical field of encoding and decoding of the network protocol format. The network protocol format comprises a plurality of data items; adjacent data items are segmented by data item separators; each data item is expressed by a key value; the key values are divided into key values with keys and key values without keys; the key values with keys are composed of keys and values; the keys express names of data; the values express specific values of the data; the keys and values are segmented by key value separators; and the key values without keys are only composed of values. According to the network protocol format, the method and the system, the encoding and decoding efficiency is high, thereby facilitating encoding and decoding; and the occupation size of the encoded data is relatively small, thereby facilitating transmission of the network data.