56results about How to "Improve video performance" patented technology

A method of improving video performance in video surveillance system having a wireless encoder connected to a video surveillance network by a wireless access point device comprises the steps of allocating channel bandwidth to the wireless encoder from the wireless access point device, transmitting packets of video data from the wireless encoder to the wireless access point device, transmitting signals from the wireless access point device to the wireless encoder, monitoring the strength of the signals received by the wireless access point device, the strength of the signals received by the wireless encoder, and the number of lost packets of video data transmitted from the wireless encoder to the wireless access point device, sending a request from the wireless encoder to the wireless access point device to change the bit transmission rate of the wireless encoder if the strength of the signals received by the wireless access point device is less than a first threshold, if the strength of the signals received by the wireless encoder is less than a second threshold, or if the number of lost packets of video data is greater than a third threshold, and changing the bit transfer rate of the wireless encoder if the wireless access point device approves the change.

The invention relates to a video encoder (201) for encoding a video signal. The video encoder comprises a segmentation processor (207) which divides the picture into picture regions. Preferably, picture regions having a high degree of flatness or uniformity are determined in this way. A characteristics processor (209) determine a spatial frequency characteristic for each picture region, and a coding controller (211) selects an encoding block size, such as a prediction block size for motion estimation, in response to the spatial frequency characteristic. An encode processor (213) encodes the picture using the selected encoding block size. Specifically, increasing block sizes are selected for increasing degrees of uniformity or flatness indicated by the spatial frequency characteristic. Thereby, an increasing proportion of high frequency components and a consistent choice of encoding block sizes are maintained, and thus the coding artefacts from many encoders having variable prediction block sizes is reduced. The invention is particularly suitable for H.264 and similar encoders.

A video encoding system uses both a central processing unit (CPU) and a graphics processing unit (GPU) to perform video encoding. The system implements a technique that enables the GPU to perform motion estimation for video encoding. The technique allows the GPU to perform a motion estimation process in parallel with the video encoding process performed by the CPU. The performance of video encoding using such a system is greatly accelerated as compared to encoding using just the CPU. Also, data related to motion estimation is arranged and provided to the GPU in a way that utilizes the capabilities of the GPU. Data about video frames may be collocated to enable multiple channels of the GPU to process tasks in parallel. The depth buffer of the GPU may be used to consolidate repeated calculations and searching tasks during the motion estimation process.

A method for improving rate distortion performance of a compression system through parallel coefficient cancellation in a transform comprising the steps of (A) determining a block sum of absolute values for each of a plurality of blocks in a macroblock and (B) setting one or more coefficient values of a block to zero in response to a block sum value of said block being less than a first predetermined threshold value.

An object of the present invention is to provide a driving method by which excellent image quality and high video performance can be obtained as well as liquid crystal display devices and electronic devices with excellent image quality and high video performance. A pixel for monitor use is provided in a liquid crystal display device, and luminance of the pixel is detected using a light sensor. Herewith, because changes in luminance of a backlight with changes in the environment and the amount of time it takes for response of the liquid crystal become able to be calculated, control of the backlight in real time using the calculated information can be performed.

A method for measuring multimedia communication quality is disclosed. The multimedia video communication quality may be objectively reflected through the embedment and extraction of digital watermark under a precondition that the quality of the multimedia video data is not obviously affected. In the invention, each frame of the multimedia video data is uniformly divided into blocks of equal size and watermark data is embedded in each of the blocks, so that the watermark may be uniformly distributed. The multimedia video data are divided into groups, and the watermark is embedded in a part of the frames with equal interval between the frames in each group to reduce the effect of the watermark on the data. The watermark information is directly embedded in the spatial domain of the original video data. The PSNR of the video data is linearly fitted using the accuracy rate of the recovered watermark relative to the original watermark, and the fitted PSNR is regarded as a measurement indication of the multimedia video communication quality. Post-processing such as smoothing filtering is performed on video frames after watermark extraction to eliminate the effect of the watermark on the multimedia video data quality.

The present disclosure relates to a live broadcast processing method, device, terminal equipment and system. The method includes: establishing a live connection with the guest client; receiving the guest audio stream sent by the guest client; synthesizing the local anchor audio stream and the guest audio stream to obtain the target audio stream; sending the audio stream to the server The target audio stream, so that the server sends the target audio stream to the audience client and the guest client. The solution of the present disclosure can solve the problem of communication delay during multi-person live broadcast and improve user experience.

The systems and methods described herein are directed at accelerating video encoding using a graphics processing unit. In one aspect, a video encoding system uses both a central processing unit (CPU) and a graphics processing unit (GPU) to perform video encoding. The system implements a technique that enables the GPU to perform motion estimation for video encoding. The technique allows the GPU to perform a motion estimation process in parallel with the video encoding process performed by the CPU. The performance of video encoding using such a system is greatly accelerated as compared to encoding using just the CPU.In another aspect, data related to motion estimation is arranged and provided to the GPU in a way that utilizes the capabilities of the GPU. Data about video frames may be collocated to enable multiple channels of the GPU to process tasks in parallel. The depth buffer of the GPU may be used to consolidate repeated calculations and searching tasks during the motion estimation process. The use of frame collocation and depth buffer enables the GPU to be better utilized and to further accelerate video encoding.

The present disclosure provides an adaptive overlapped block motion compensation apparatus employing adaptive weights including: an RBMC(x,y) calculator for calculating residual signal RBMC(x,y) in block motion estimation; a DN(x,y) calculator for calculating differential pixel value DN(x,y) between a motion compensated block generated by a motion vector of an adjacent block and a currently motion compensated block; a unit for updating and setting additional information for performing an adaptive overlapped block motion compensation based on RBMC(x,y) and DN(x,y); and an adaptive overlapped block motion compensation operating on respective pixels in certain pixel units based on the additional information, progressing to subsequent pixels if an absolute value of RBMC(x,y) is not greater than the additional information, and if the absolute value of RBMC(x,y) is greater than the additional information, calculating an ROBmc(x,y) with an HN(x,y) selectively signed so that an absolute value of ROBMC(x,y) is smaller than the absolute value of RBMC(x,y).

Described is a system for improving object recognition. Object detection results and classification results for a sequence of image frames are received as input. Each object detection result is represented by a detection box and each classification result is represented by an object label corresponding to the object detection result. A pseudo-tracklet is formed by linking object detection results representing the same object in consecutive image frames. The system determines whether there are any inconsistent object labels or missing object detection results in the pseudo-tracklet. Finally, the object detection results and the classification results are improved by correcting any inconsistent object labels and missing object detection results.

A view finder device for enabling an ordinary video camera to be used for broadcast use. The view finder device includes a control signal input for receiving control signals including a video-select signal; a camera video signal input for receiving a camera video signal from a video camera; an interrupt video signal input for receiving an interrupt video signal from a video interrupt source which is different from the video camera; a video selector for displaying either the camera video signal or the interrupt video signal, according to the video-select signal; a display controller for controlling display of a video selected by the video selector; and a control signal output for outputting the control signals after the video-select signal is removed therefrom.

The invention discloses a video processing method and device, an electronic device, and a storage medium and relates to the electronic device technology field. The method is applied to the electronicdevice. The method comprises the following steps of when the electronic device plays a video file, detecting a resolution corresponding to the video file; selecting a target optimized parameter corresponding to the resolution from all optimized parameters based on the resolution corresponding to the video file; and carrying out display enhancement processing on the video file based on the target optimized parameter, wherein during the display enhancement processing, the target optimized parameter is used to process an image in the video file so as to improve the video image quality of the video file. By using the video processing method and device, the electronic device, and the storage medium, the different optimized parameters are determined according to the different resolutions of thevideo file, and through the optimized parameter corresponding to the resolution, the display enhancement processing is performed on the video file so as to provide the video processing method with applicability; and a video effect and a user experience are improved.

An electronic device comprises a camera and a screen. The camera is fixed into the screen. The screen includes a display panel used for displaying images, and the display panel includes a front surface facing users. The camera includes a lens element and an image converter, the lens element includes a lens and a mirror which forms an acute angle with the lens, and the lens is disposed on a side, away from the front surface, of the display panel. According to the electronic device provided by the invention, incoming light passes through the display panel and enters the lens, the mirror reflects the incoming light to the image converter, and the image converter generates a corresponding image according to the incoming light reflected to the image converter. Meanwhile, the camera is fixed between the display panel and a light emitting module, which is conducive to the miniaturization of the electronic device, helps to prevent the accumulation of dust or scratching of the lens element, and improves the video effect.

A video encoding / decoding method and apparatus using split prediction is provided.The video encoding / decoding method and apparatus using split prediction splits a block into various partition shapes in addition to a conventional standardized right-angled quadrangular shape so as to effectively predict an image of a current block from a previous image and thus, may more improve the performance of video data compression and may achieve superior reconstructed image quality.

An object of the present invention is to provide a driving method of a liquid crystal display device for improvement of image quality and a liquid crystal display device in which the driving method is used. One frame period is divided up into an n (n: integer, n≧3) number of periods (hereinafter referred to as subframe periods). Furthermore, a voltage is applied to a liquid crystal so as to correct for a loss in luminance resulting from response speed of the liquid crystal. The voltage for correction is applied during subframe periods other than the first subframe period.

The invention discloses a method and a device for adjusting image property, wherein the method comprises the following steps that: obtaining the image property parameters of a YUV image; and adjusting the image property parameters according to a preset strategy, and obtaining the adjusted image property. After being applied, the method and the device provided by the embodiment for adjusting the image property omit two times of module conversion of YUV to RGB and RGB to HSV, prevent the problems of excessive calculation and to many consumed resources when the image property of the YUV image is adjusted, so that the occupied resources during the adjustment are very few because the property of the YUV image data is directly adjusted, thereby greatly improving the adjustment efficiency. In addition, the embodiment increases methods for dynamically adjusting the brightness of the image and improves the video effect of image adjustment. Through test and comparison, the adjustment effect of the invention is better than the method for adjusting the color property after converting through a color model.

The invention discloses a dual broadcasting interface control platform. The platform adopts two manners to control the content of a pre-monitoring window and the content of a broadcasting window respectively, thereby improving control flexibility; in addition, when the pre-monitoring window or the broadcasting window is controlled by any one manner, the video state of the other window does not change; after the video of the pre-monitoring window is processed, the processed video can be synchronized in the broadcasting window through a synchronization manner, so that the video effect can be improved; furthermore, one set of control key in the broadcasting control platform can support the control of the pre-monitoring window and the broadcasting window, and the dual broadcasting interface control platform is convenient for users to carry.

Disclosed are solutions for improving Internet video streaming. A first number is determined based on one or more parameters, including network conditions. A second number is then determined corresponding to a number of video segments that is greater than or equal in size to a third number determined based on a bandwidth-delay product of the network to a remote machine. The second number of video segments is then requested in a pipelined fashion. Pipelined requests are stopped when a predetermined size of the video has been requested that is greater than or equal to the first number. Alternatively, a request is sent to the remote machine to send a portion of the video, where the size of the portion of the video is equal to the first number or equal to the size of video remaining if less than the first number. Combined with pipelining, the approach achieves near-optimal throughput and fast bitrate adaptation, regardless of control plane algorithm.

An object of the present invention is to provide a driving method by which excellent image quality and high video performance can be obtained as well as liquid crystal display devices and electronic devices with excellent image quality and high video performance. A pixel for monitor use is provided in a liquid crystal display device, and luminance of the pixel is detected using a light sensor. Herewith, because changes in luminance of a backlight with changes in the environment and the amount of time it takes for response of the liquid crystal become able to be calculated, control of the backlight in real time using the calculated information can be performed.

Disclosed is a processing method used in a video conference system having a local terminal device and at least one remote terminal device, comprising a feature detection step of carrying out a feature detection in the local terminal device and the remote terminal device, respectively; a conference mode setting step of setting a conference mode for the local terminal device and the remote terminal device, respectively; and a video encoding step of dividing a video frame in the local terminal device and the remote terminal device, and then pre-processing the divided areas so as to encode the pre-processed areas, respectively.

The invention discloses a cloud monitoring system, and relates to the field of cloud monitoring. The system comprises distributed cascade cloud monitoring systems, and each cloud monitoring system comprises an acquisition device, a cloud platform and a user device; a cloud platform which is used for sending the video stream to a streaming media unit of the cloud platform by the acquisition equipment according to a scheduling strategy after the management unit of the cloud platform generates the scheduling strategy according to the request of the user equipment, and the streaming media unit respectively sends, stores and transcodes the video stream according to the scheduling strategy; a central management server, a media distribution scheduling server, an access management server, a storage server and user equipment of the cloud platform transmit strategies and stream processing mechanisms through control signaling. According to the cloud monitoring system, the problem of poor stability of the existing cloud monitoring system is solved, and the reliability, stability and security of the service are ensured by isolating the media stream and the signaling stream.

The invention discloses a video file format converting method and device to achieve the purpose that a user can convert video formats conveniently and realize the optimal video quality. The video file format converting method comprises steps as follows: unpacking and decoding a to-be-converted video file to acquire source data; performing frame rate conversion on the source data to acquire converted source data; performing H.263 coding on the converted source data to acquire H.263 coded data; performing 3GP packing on the H.263 coded data to obtain a video file with the output format of 3GP, wherein the compatibility adopts the std item. According to the method, H.263 coding and 3GP packing methods are bound together to be implemented, the user is not required to select matching of coding and packing methods, the compatibility adopts the std item, the application range of the video file with the format converted is enlarged, and the effect of the video file with the format converted is improved.

The embodiment of the invention provides an audio and video playing device which comprises a second audio and video processing device for converting video data of a second format from a second source signal interface into video data of a first format and processing the audio data from the second source signal interface and a first audio and video processing device, the first audio and video processing device used for processing the audio data from a first source signal interface and the video data of the first format from the first source signal interface and the second audio and video processing device, a sound box system used for receiving the processed audio data from the second audio and video processing device and playing the audio data, and a data transmission device for sending the video data processed by the first audio and video processing device to a display device through a wired or wireless transmission mode. According to the embodiment of the invention, the processing ability of audio and video data can be improved, and the cost is saved.

The invention provides a method for adjusting dynamic exposure of a camera in automatic driving. The method comprises the following steps: (1), demarcating the camera to obtain the maximal exposure time Emax and the minimal exposure time Emin of the camera and the maximal grey level Gmax and the minimal grey level Gmin of an image photographed by the camera; (2), extracting an image in the current frame of the camera, comparing the average grey level Gavg of the image in the current frame with the Gmax and the Gmin so as to correct the Gavg, and obtaining a pre-adjusted exposure time Etmp of the current image according to the Gavg and the exposure time Ex' of the previous frame of image; and (3), correcting the Etmp after comparing the Etmp with the Emax and the Emin so as to obtain the optimal exposure time Ex, which can be used when the next frame of image is acquired, and then, returning to the step (2). According to the invention, dynamic adjustment of the exposure time of the camera in motion is realized; therefore, the camera is adaptive to change of surroundings of a high-speed mobile intelligent vehicle; the optimal exposure is continuously adjusted along with change of times and environments; and thus, the image definition obtained by the camera is obviously improved.

The invention provides a video processing method and electronic equipment. The method comprises the following steps: acquiring an audio signal and image information in a video recording process; acquiring a plurality of audio sub-sequences and position information of a sound source corresponding to each audio sub-sequence according to the audio signal; acquiring position information of a video recording main body according to the image information; determining a target sound source corresponding to the video recording main body and a target audio sub-sequence corresponding to the target soundsource according to the position information of the video recording main body and the position information of the sound source corresponding to each audio sub-sequence; and obtaining video audios according to the target audio sub-sequence. When video recording is carried out in a noisy environment, the audio quality of the main body sound and the video effect of video recording can be improved, and the video recording experience of a user is improved.

The present invention discloses a decoding method and device, an electronic device and a storage medium, and relates to the technical field of electronic devices. The method is applied to the electronic device. The method comprises the steps of: when the electronic device runs a target application program, determining whether the target application is in a preset list or not, wherein the target application program can output video data when being running, if the target application list is in the preset list, a decoding mode of the video data is determined from a hard decoding video enhancementmode and a soft decoding video enhancement mode, and a determined decoding mode is used to perform decoding and play for the video data. According to the decoding method and device, the electronic device and the storage medium, when the application program is in the preset list, the decoding mode is determined from the hard decoding video enhancement mode and the soft decoding video enhancement mode to perform decoding and playing for the video data so as to automatically select an adaptive decoding mode and improve the video effect and user experience.

Disclosed is a processing method used in a video conference system having a local terminal device and at least one remote terminal device, comprising a feature detection step of carrying out a feature detection in the local terminal device and the remote terminal device, respectively; a conference mode setting step of setting a conference mode for the local terminal device and the remote terminal device, respectively; and a video encoding step of dividing a video frame in the local terminal device and the remote terminal device, and then pre-processing the divided areas so as to encode the pre-processed areas, respectively.

The present disclosure provides an adaptive overlapped block motion compensation apparatus employing adaptive weights including: an RBMC(x,y) calculator for calculating residual signal RBMC(x,y) in block motion estimation; a DN(x,y) calculator for calculating differential pixel value DN(x,y) between a motion compensated block generated by a motion vector of an adjacent block and a currently motion compensated block; a unit for updating and setting additional information for performing an adaptive overlapped block motion compensation based on RBMC(x,y) and DN(x,y); and an adaptive overlapped block motion compensation operating on respective pixels in certain pixel units based on the additional information, progressing to subsequent pixels if an absolute value of RBMC(x,y) is not greater than the additional information, and if the absolute value of RBMC(x,y) is greater than the additional information, calculating an ROBMC(x,y) with an HN(x,y) selectively signed so that an absolute value of ROBMC(x,y) is smaller than the absolute value of RBMC(x,y).