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38results about How to "Reduce the transmission bit rate" patented technology

Rotary data and power transfer system

A data and power transfer system comprising a first system unit which includes a first communication element operable to transfer communication signals and a first connector element operable to transfer electrical power; and a second system unit which includes a second communication element operable to transfer communication signals and a second connector element operable to transfer electrical power, wherein the first communication element and second communication element are operable to transfer data between one another and the first connector element and second connector element are operable to transfer electrical power whilst electrically insulated from one another.
Owner:WFS TECH

System and method for providing high-quality stretching and compression of a digital audio signal

An adaptive “temporal audio scaler” is provided for automatically stretching and compressing frames of audio signals received across a packet-based network. Prior to stretching or compressing segments of a current frame, the temporal audio scaler first computes a pitch period for each frame for sizing signal templates used for matching operations in stretching and compressing segments. Further, the temporal audio scaler also determines the type or types of segments comprising each frame. These segment types include “voiced” segments, “unvoiced” segments, and “mixed” segments which include both voiced and unvoiced portions. The stretching or compression methods applied to segments of each frame are then dependent upon the type of segments comprising each frame. Further, the amount of stretching and compression applied to particular segments is automatically variable for minimizing signal artifacts while still ensuring that an overall target stretching or compression ratio is maintained for each frame.
Owner:MICROSOFT TECH LICENSING LLC

System and method for providing high-quality stretching and compression of a digital audio signal

An adaptive “temporal audio scaler” is provided for automatically stretching and compressing frames of audio signals received across a packet-based network. Prior to stretching or compressing segments of a current frame, the temporal audio scaler first computes a pitch period for each frame for sizing signal templates used for matching operations in stretching and compressing segments. Further, the temporal audio scaler also determines the type or types of segments comprising each frame. These segment types include “voiced” segments, “unvoiced” segments, and “mixed” segments which include both voiced and unvoiced portions. The stretching or compression methods applied to segments of each frame are then dependent upon the type of segments comprising each frame. Further, the amount of stretching and compression applied to particular segments is automatically variable for minimizing signal artifacts while still ensuring that an overall target stretching or compression ratio is maintained for each frame.
Owner:MICROSOFT TECH LICENSING LLC

Method and device for indicating quantizer parameters in a video coding system

A method and device for coding of digital video sequence, wherein an indication of quantization parameter (QP) is provided in the encoded bit-stream for decoding purposes. The QP related information is indicated by introducing a sequence level quantization parameter value SQP. More specifically, instead of coding the absolute values of picture / slice QPs, an indication of the difference ΔQP between the sequence level quantization parameter SQP and the picture / slice QP is provided. This eliminates the need to transmit a full QP for every picture / slice, and enables a statistically smaller difference value to be transmitted, thus providing a reduction in transmission bit-rate. The difference value is subsequently used in a corresponding decoder to reconstruct the picture / slice QP.
Owner:NOKIA CORP

Systems and methods for compressing video content

Systems and methods for providing imaging content using spatially varying encoding quality. Imaging content may be acquired using spherical lenses (e.g., fisheye). When viewing spherical imaging content, spherical to planar image transformations may be utilized. Such transformations (e.g., equirectangular) may be characterized by spatially varying image distortion. Transformed images may be encoded. Encoding process may be configured based on spatially varying encoding quality. Encoding quality may be configured based on the transformation such that portions of the transformed image characterized by greater distortion may be encoded using lower quality (e.g. greater QP values); portions of the transformed image characterized by lower distortion may be encoded using greater quality (e.g. lower QP values). Such encoding may produce a bitstream characterized by a lower bitrate for a given quality and / or better quality for a given bitrate as compared to an encoding process that may apply a uniform encoding quality.
Owner:GOPRO

Video networking service front-end computer

The invention discloses a video networking service front-end computer with an interconnected and intercommunicated video management platform. The video networking service front-end computer comprises a video front-end processor (FEP), a configuration client and a video management platform, wherein the video FEP consists of an analog video capture / conversion module, a universal message module, a digital video reception / conversion module, a video diagnosis module, a control protocol gateway, a coding module H.263 and a communication control protocol interface module; and the configuration client can be in information interaction with the video FEP through the video management platform so as to complete the configuration, operation and maintenance of the FEP. According to the video networking service front-end computer, the output supports ONVIF (Open Network Video Interface Forum) and GB / T28181 standard protocols, and the input supports various heterogeneous system private protocols, so that an extensive media resource support for the interconnection and intercommunication of heterogeneous video systems is provided; and meanwhile, the configuration is flexible and convenient, the network adaptability is strong, and the video data is secure and reliable.
Owner:安徽博微广成信息科技有限公司

Method for determining motion vector predicted value and related device

The embodiment of the present invention discloses a method for determining a motion vector predicted value and a related device. The method includes: acquiring the motion vector precision of a block to be processed; acquiring at least one first predicted motion vector of the block to be processed; determining a target predicted motion vector according to the motion vector precision and the at least one first predicted motion vector, wherein the target predicted motion vector has the motion vector precision; after the target predicted motion vector is obtained, using the target predicted motionvector as a decoding-side motion vector to derive a DMVD motion vector predicted value to be inserted into a candidate motion vector predicted value list, wherein the candidate motion vector predicted value list also has the motion vector precision. The method in the embodiment of the invention can further shorten the encoding and decoding time, reduces a code rate, and increases video transmission efficiency.
Owner:HUAWEI TECH CO LTD

Hardware coprocessor for stripe-based interest point detection

A hardware coprocessor architecture calculates the Difference-of-Gaussian (DoG) pyramid of an input image and extracts from this the interest points to be used in several image detection algorithms. Advantages of the architecture include the possibility to process the image by stripes, namely by blocks having one dimension coincident with the input image width, in the absence of an input frame buffer and the possibility to avoid RAM memory. The coprocessor is suitable to be tightly coupled with raw image sources like sensors.
Owner:STMICROELECTRONICS INT NV

Three-dimensional video encoding method based on depth image rendering

The invention discloses a three-dimensional video encoding method based on depth image rendering. The encoding method disclosed by the invention comprises the following steps of: projecting an original left-viewpoint colorful image to a right viewpoint from a left viewpoint through a method based on the depth image rendering, so as to obtain a residual image of an rendered image of an original right-viewpoint colorful image and the original left-viewpoint colorful image; carrying out pre-processing operation on the residual image and encoding the original left-viewpoint colorful image and the pre-processed residual image; and finally, obtaining a finally-reconstructed image of the decoded right-viewpoint colorful image according to the rendered image of the decoded right-viewpoint colorful image and the decoded residual image. According to the invention, on the premise of ensuring the higher reconstruction quality of the right-viewpoint colorful image, the encoding efficiency of a three-dimensional video is greatly improved.
Owner:NINGBO UNIV

Mobile device with an underwater communications system and method

A mobile device with an underwater communications system is provided that transmits electromagnetic and / or magnetic signals to a remote receiver. The transmitter includes a data input. A digital data compressor compresses data to be transmitted. A modulator modulates compressed data onto a carrier signal. An electrically insulated, magnetic coupled antenna transmits the compressed, modulated signals. The receiver that has an electrically insulated, magnetic coupled antenna for receiving a compressed, modulated signal. A demodulator is provided for demodulating the signal to reveal compressed data. A de-compressor de-compresses the data. An appropriate human interface is provided to present transmitted data into text / audio / visible form. Similarly, the transmit system comprises appropriate audio / visual / text entry mechanisms. The portable device may be wearable.
Owner:CSIGNUM LTD

Skipping coding mode pre-judgment method for highly efficient video coding standard

The invention provides a skipping coding mode pre-judgment method for a highly efficient video coding standard. The objective of the invention is to solve problems of quite high complexity of current standard coding and quite long coding time. The method comprises following steps of calculating the rate-distortion cost of a coding block so as to acquire a movement vector and residual information; using the size of the moving vector and the residual information to judge whether the coding block is a skipping mode, if no, entering the next top, or else, processing the next coding block; calculating rate-distortion cost of the previous frame of a coding block adjust the current coding block and the next frame of the coding block; using the size of the moving vector and the residual information to judge adjacent coding blocks and using a entropy difference concept to replace tediously calculated interactive information. According to the invention, a skipping mode is rapidly judged; when excellent coding performance is obtained, massive coding time is saved; the method has actual operability, so it is facilitated that real time application is performed; and when the video coding efficiency is not reduced, massive coding time is saved.
Owner:ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY

Hardware coprocessor for stripe-based interest point detection

A hardware coprocessor architecture calculates the Difference-of-Gaussian (DoG) pyramid of an input image and extracts from this the interest points to be used in several image detection algorithms. Advantages of the architecture include the possibility to process the image by stripes, namely by blocks having one dimension coincident with the input image width, in the absence of an input frame buffer and the possibility to avoid RAM memory. The coprocessor is suitable to be tightly coupled with raw image sources like sensors.
Owner:STMICROELECTRONICS INT NV

Optimization method and device for bandwidth usage

InactiveCN103248682AReduce the first flow control requestImprove experienceData switching networksGraphicsTime delays
The embodiment of the invention discloses an optimization method and device for bandwidth usage, relates to the field of communication, and ensures that user experience is improved as graphics applications and media applications of the client side can obtain enough data timely. The invention adopts the specific scheme that the optimization method comprises the steps as follows: acquiring a data processing time delay; judging relationship of the time delay and a preset time delay threshold, wherein the time delay threshold comprises a first time delay threshold; and when the time delay is greater than the first time delay threshold, sending a first flow control request used for requesting the server to reduce transmission bit rate to the server, so as to enable the server to reduce the transmission bit rate conveniently via the first flow control request, and further enable the client side to obtain enough data timely. The optimization method and device are applied to the optimization process of bandwidth usage.
Owner:HUAWEI TECH CO LTD

Sending end, receiving end and video transmission method and system

The invention discloses a sending end, receiving end and a video transmission method and system. The video transmission method comprises the steps that the sending end carries out H.265 encoding on an acquired ultrahigh-definition program, an ultrahigh-definition TS is generated, and the ultrahigh-definition TS is modulated into a radio frequency signal to be sent; the receiving end demodulates and unpacks the received radio frequency signal to obtain the ultrahigh-definition program, and the ultrahigh-definition program is output to a digital television receiving end after being recorded. The transmission rate and storage capacity of the ultrahigh-definition program can be reduced through H.265 encoding. Through recording and transmitting, the video-on-demand and play-back functions of the ultrahigh-definition program can be achieved. Therefore, the problem that due to fact that the code rate of the ultrahigh-definition television program is too large, an existing VOD system does not support transmission and operation of the ultrahigh-definition program is solved.
Owner:SHENZHEN COSHIP ELECTRONICS CO LTD

Data transmission method and device and nonvolatile storage medium

ActiveCN112468855AReduce the acquisition frame rateReduce resolutionSelective content distributionData packEngineering
The invention discloses a data transmission method and device and a nonvolatile storage medium. The method comprises the following steps: acquiring a first transmission code rate when acquisition endequipment sends a multimedia data stream; when the first transmission code rate is greater than the bandwidth threshold, adjusting the coding strategy of the multimedia data stream to obtain a targetcoding strategy; encoding the multimedia data stream by adopting the target encoding strategy, and continuously detecting a second transmission code rate of the multimedia data stream after the multimedia data stream is encoded by adopting the target encoding strategy; and when the second transmission code rate is smaller than or equal to the bandwidth threshold, stopping adjusting the encoding strategy, and continuing to send the multimedia data stream. The technical problems that in the image transmission process, due to the fact that the network transmission bandwidth is not enough, a userreceiving end cannot receive a data packet of a complete frame of a picture, a video is blocked or a black screen is caused, and the user experience is influenced are solved.
Owner:XIAN WANXIANG ELECTRONICS TECH CO LTD

UAV flight experience method, device, system and unmanned aerial vehicle

A UAV (unmanned aerial vehicle) flight experience method comprises the steps: (101) obtaining a multi-dimensional stereoscopic video file captured by a photographing device provided on a UAV; (104) compressing and encoding the multi-dimensional stereoscopic video file and generating a continuous video stream; (105) transmitting the encoded multi-dimensional stereoscopic video file to the receiving end; (106 ) decoding the received multi-dimensional stereoscopic video file at the receiving end to obtain the decoded multi-dimensional stereoscopic video file; (107) and displaying the decoded multi-dimensional stereoscopic video file. The invention also relates to a UAV flight experience device and system and an unmanned aerial vehicle.
Owner:SZ DJI TECH CO LTD

A low code rate coding and decoding scheme for multi-language circle stereo

InactiveCN101166377ASave storage spaceSave frequency bandwidthStereophonic systemsMultiplexingMulti language
Belonging to technical area for encoding and decoding audio of digit TV and video disk, the invention solve issue how to reduce data quanitity to be transmitted and stored when digit TV or video disk transmits or stores multilingual accompanying sounds, all of which are walkaround stereo in 5.1 sound track. Main points of the technical scheme are that dialogue signal of multilingual human voices and one route of background sound signal in 5.1 sound track are compressed all alone respectively; then, after packaging and multiplexing operation, the method transmits or stores the said compressed data. When decoding and playing back, recombining and mixing the compressed dialogue signal of multilingual human voices (selecting one language) with background sound signal so as to restore walkaround stereo in 5.1 sound track for one language. The invention is applicable to digit TV and video disk (DVD,high resolution DVD) mainly.
Owner:施伟强

Joint source-channel decoding method and associated joint source-channel decoder

The inventive joint source-channel method for decoding digital data received by the channel decoder (51) of a digital data decoder (50), wherein said data are received by transmitting digital data coding discrete values or symbols (I, j) emitted by a source (10) through a transmission channel (40) and, wherein the probabilities associated with said symbols are applied to the channel decoding lattice of said channel decoder (51). According to said invention, said probabilities (p(i)) and (p(i / j)) are statistically evaluated by the decoder (50). The invention can be used for encoding and decoding digital data transmitted through a communications channel.
Owner:FRANCE TELECOM SA

Cloud video transcoding method and device, decoding method and device, and electronic equipment

The embodiment of the invention provides a cloud video transcoding method and device, a decoding method and device, and electronic equipment, and the method comprises the steps: receiving a video request from a user side, and extracting the background information of a corresponding video and a coding region of a target foreground; based on the background duration, performing first encoding on therepresentative frame images with the same background to obtain first background encoded data, and performing second encoding on the rest frame images to obtain second background encoded data, whereinthe compression ratio of the second encoding is greater than the compression ratio of the first encoding; performing third encoding on the encoding area of the target foreground to obtain target foreground data, wherein the compression ratio of the third encoding is less than or equal to the compression ratio of the first encoding; and combining the first background data, the second background data and the target foreground data into a target video file, and sending the target video file to a user side. The data volume of the target video file can be reduced, and the target video file with a lower transmission code rate is improved.
Owner:SHENZHEN WANJIAAN IOT TECH CO LTD

Systems and methods for compressing video content

Systems and methods for providing imaging content using spatially varying encoding quality. Imaging content may be acquired using spherical lenses (e.g., fisheye). When viewing spherical imaging content, spherical to planar image transformations may be utilized. Such transformations (e.g., equirectangular) may be characterized by spatially varying image distortion. Transformed images may be encoded. Encoding process may be configured based on spatially varying encoding quality. Encoding quality may be configured based on the transformation such that portions of the transformed image characterized by greater distortion may be encoded using lower quality (e.g. greater QP values); portions of the transformed image characterized by lower distortion may be encoded using greater quality (e.g. lower QP values). Such encoding may produce a bitstream characterized by a lower bitrate for a given quality and / or better quality for a given bitrate as compared to an encoding process that may apply a uniform encoding quality.
Owner:GOPRO

Method and device for space stage compression

The method includes steps: first, after descending sampling video steam, carrying out encoding so as to obtain a basis steam; next, decoding and ascending sampling the said basis steam so as to obtain a rebuilding stream; subtracting the rebuilding stream from video steam so as to obtain a residue stream; then, carrying out edge detection analysis for the said video steam so as to obtain gain value of each pixel in the said video stream; finally, multiplying the said residue stream by gain value, and encoding the multiplied result so as to obtain a enhanced stream. The invention subdivides type of each pixel in order to obtain more accurate gain value. Thus, under precondition of ensuring image quality, the invention reduces quantity of transferred data further as well as reduces rate of transmission code needed by enhanced layer.
Owner:KONINK PHILIPS ELECTRONICS NV

Method and device for treatment after noise enhancement in broadband voice decoding

The invention relates to a method and device for treatment after noise enhancement in broadband voice decoding. The method includes: S1, detecting voice / non-voice characteristics of a current frame, and calculating noise factors of the current frame; S2, determining whether the noise factors are larger than a preset threshold value; S3, when noise factors are larger than the preset threshold values, performing energy smoothing treatment on fixed code vectors of the current frame to obtain the fixed code vectors performed with energy smoothing; and S4, adding up self-adaption code vectors and the fixed code vectors performed with the energy smoothing treatment to compose excitation signals. The invention further relates to a method for wideband voice decoding and a decoder. The method and device performs smoothing treatment on energy of the fixed code vectors by means of the characteristics of decoding noise factors of voice signals, and accordingly, the aim of enhancing noises can be achieved. The method and device is applicable to various voice coders and decoders, algorithm complexity is low, and code transmission rate cannot be increased additionally.
Owner:SHENZHEN GUANGSHENG XINYUAN TECH

Image processing method and device, medium and electronic equipment

The invention belongs to the technical field of artificial intelligence, and particularly relates to an image processing method, an image processing device, a computer readable medium and electronic equipment. The image processing method comprises the following steps: receiving image coding data of a video clip transmitted by a coding end; the image coding data is decoded, a first video frame, key points in the first video frame and key points in a second video frame are obtained, and the key points are used for representing the motion posture of a target object in the video frames; according to the key points in the first video frame and the key points in the second video frame, generating transformation information of the motion posture of the target object; and generating a reconstructed image of the second video frame according to the first video frame and the transformation information.
Owner:TENPAY PAID TECH

Multiple side information distributed video coding method based on JND, multiple side information distributed video decoding method based on JND and multiple side information video coding and decoding system based on JND

The invention discloses a multiple side information distributed video coding method based on JND, a multiple side information distributed video decoding method based on JND and a multiple side information video coding and decoding system based on JND, wherein the video coding method comprises the following steps: acquiring image information, dividing a video sequence into a WYNER-ZIV frame and a key frame, for the WYNER-ZIV frame, performing DCT conversion and threshold filtering treatment based on JND, performing scalar quantization and then forming a bit plane, and transmitting the bit planeto a LDPCA coder to perform coding, and for the K frame, using a entropy coding method; and the decoding method comprises the following steps: performing decoding for the key frame, generating multiple side information according to the key frame, and performing DCT conversion and threshold filtering treatment based on JND for the multiple side information, uniting a WYNER-ZIV frame code stream output by the coder and the obtained side information, and performing reconstruction for the WYNER-ZIV frame according to correlation between the WYNER-ZIV frame code stream and the side information. According to the invention, by the multiple side information method, a more accurate reconstructed frame can be obtained, and system performance can be improved.
Owner:SHANDONG NORMAL UNIV

Image processing device and electronic apparatus using the same

An image processing device includes a compression circuit adapted to perform compression of image data after sorting the pixels in an arrangement included in a plurality of lines in image data into a plurality of lines corresponding respectively to color components, a memory adapted to store the image data thus compressed, and an expansion circuit adapted to expand the image data thus compressed to restore the arrangement of the pixels.
Owner:SEIKO EPSON CORP

Real-time video stream transcoding method, device and computer-readable storage medium

The invention discloses a real-time video stream transcoding method. The method comprises the following steps: obtaining an original image frame of an input video stream; extracting the original imageframe according to a preset frame extraction rule to obtain extracted image frames; selecting a corresponding frame from the extracted image frames according to a preset frame distance to serve as akey frame, and using the other frames as ordinary frames; and performing compressed encoding on the key frame and the ordinary frames according to a preset compressed encoding algorithm to obtain an encoded code stream. The invention also provides a real-time video stream transcoding apparatus and a computer readable storage medium. By adoption of the technical scheme of the invention, by reducingthe frame of the input video stream and performing compressed encoding on the extracted image frames by using the preset frame distance and the compressed encoding algorithm, the real-time transcoding and transmission of the video stream is implemented, thereby reducing the transmission rate and reducing the video transmission bandwidth cost.
Owner:广州图普网络科技有限公司

Signal processing method of interactive three-dimensional video system

The invention discloses a signal processing method of an interactive three-dimensional video system. The signal processing method comprises the following steps of: firstly, taking multiple virtual viewpoints between each two adjacent reference viewpoints as auxiliary viewpoints, obtaining the residual image of each auxiliary view point, then encoding each color image, each depth image and each residual image by using a three-dimensional video coding module of a server, transmitting each color image, each depth image and each residual image to a user side, decoding each coded image by using a viewpoint decoding module of the user side, finally generating reference viewpoint signals and auxiliary viewpoint signals by any viewpoint drawing modules, and transmitting the reference viewpoint signals and the auxiliary viewpoint signals to a video display module for display. The signal processing method has the advantages that as the server only needs to transmit the residual images containing less information content as the auxiliary viewpoint information, the coding complexity of the system server is reduced, and as virtual viewpoint signals can be generated at the server only through simple three-dimensional mapping and add operation, the requirements on user side systems are reduced, thus the complexity of the interactive three-dimensional video system is reduced.
Owner:北京飞天云动科技有限公司

Natural three-dimensional television system

InactiveCN101312542BReal 3D effect3D effect with different qualityImage analysisTelevision systemsViewpointsDisplay device
The invention discloses a natural three-dimensional television system, which adopts a multi-destination stereo camera to attain a colorful image of a scene, adopts an image correcting module to compensate brightness and colors, adopts a content producing module to extract three paths of code streams as a main camera colorful image, a main camera depth image and the shade information of an auxiliary camera; adopts a standard coder to process layered coding, and transmits the generated compressed stream to the standard coder via a channel, to be analyzed and decoded into three paths of code streams; adopts a viewpoint reconstruction module to reconstruct the three paths of code streams into a main camera viewpoint, an auxiliary camera viewpoint and a virtual viewpoint, to be synthesized by a display module into an image adaptive to a display device, to be displayed on the display device. The invention has the advantages that the invention is compatible with traditional 2D system, has many sideward viewpoints for reconstruction and can confirm low transmission bit rate.
Owner:ZHEJIANG UNIV +1

UAV flight experience method, device, system and UAV

A method for flying an unmanned aerial vehicle, comprising: obtaining a multi-objective stereoscopic video file (101) taken by a shooting device arranged on an unmanned aerial vehicle; compressing and encoding the multi-objective stereoscopic video file, and generating a continuous video stream ( 104); the encoded multi-eye stereo video file is transmitted to the receiving end (105); at the receiving end, the received multi-eye stereo video file is decoded to obtain the decoded multi-eye stereo video file (106 ); and displaying the decoded multi-eye stereoscopic video file (107). The invention also relates to a drone flight experience device, system and drone.
Owner:SZ DJI TECH CO LTD
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