55results 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.

A game controller, which is used in conjunction with a game device, includes a housing, a light-emitting device provided within the housing for producing flashing light of varying intensity, and a circuitry provided within the housing and generating control signals in response to signals received from the game device to control the intensity and the flashing frequency of the light emitted by the light-emitting device.

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 present disclosure provides an adaptive overlapped block motion compensation apparatus employing adaptive weights including: an R_BMC(x,y) calculator for calculating residual signal R_BMC(x,y) in block motion estimation; a D_N(x,y) calculator for calculating differential pixel value D_N(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 R_BMC(x,y) and D_N(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 R_BMC(x,y) is not greater than the additional information, and if the absolute value of R_BMC(x,y) is greater than the additional information, calculating an R_OBmc(x,y) with an H_N(x,y) selectively signed so that an absolute value of R_OBMC(_x,y) is smaller than the absolute value of R_BMC(x,y).

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.

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.

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.

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 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 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.