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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.