390 results about "Adaptive video" patented technology

A method for video playback switching in response to changing network conditions. The method includes accessing a server to retrieve respective index files for a low bit rate version and a high bit rate version of the video file, and instantiating a low bit rate media player and a high bit rate media. Playback of the video file is begun by the high bit rate media player streaming the high bit rate version from the server. Upon an indication of impeded network conditions, a transition point is selected, wherein the transition point indicates where downloading of the high bit rate version stops and where downloading of the low bit rate version begins. The low bit rate media player is then positioned to begin playback at the transition point. Playback of the video file is then switched to the low bit rate player upon encountering the transition point.

A system and method are disclosed for improved video transmission, particularly in security settings. An improved security controller combines the interfaces and functionality for high quality video delivery over often less-than-perfect wireless networks, multi-camera analog/digital video controllers and encoders, multi-frequency wireless camera support, connectivity for serial controllers, network switching, and distributed digital video recording with optional object and motion detection. The video transmission in enhanced using wireless adaptive video encoding, mobile viewing optimization, and wireless bandwidth improvement.

One embodiment of the invention sets forth an encoding server including components configured to encode a video stream associated with a content title for adaptive streaming. The video stream is first processed by a VC1 encoder to generate an encoded video stream comprising a multiple GOPs, each GOP including a key frame and having a different playback offset. The encoded video stream is then packaged such that the GOPs are stored in data packets of the packaged encoded stream. An SHI generator generates an SHI associated with the packaged encoded stream that includes a switch point associated with each GOP. Each switch point includes the playback offset associated with the corresponding GOP and the data packet storing the key frame of the corresponding GOP. The SHI associated with multiple packaged encoded video streams associated with the same content title and encoded to different playback bit rates have corresponding switch points.

A video-on-demand (VOD) system is disclosed and method for providing a real-time VOD experience using Tempo-Differential file transfer with various buffering techniques and an adaptive file distribution system. The system is configured to populate users' Set-Top-Boxes (STBs) with a set of videos which correspond to the individual user's preferences, and populates a Central Office Storage (COS) server with a larger set of videos based on an analysis of all of the users' preferences. The system thus provides a real time VOD service by either correctly predicting the videos that a user will request and preloading them onto that user's STB, or by delivering the requested video from the COS to the STB using a Tempo-Differential file transfer which delays the playing of the requested video while video trailers or other information is displayed on the video screen. When using a DSL connection to the COS, only a portion of the requested video needs to be buffered on the STB before the requested video begins playing. Accordingly, by predicting which videos a user will request and by using the Temp-Differential file transfer, a real time VOD experience is achieved.

Video player circuitry used with encoded source video and a display. Decoder circuitry receives encoded source video and decodes the encoded source video to produce a sequence of full frames of video data. Pre-processing circuitry, pursuant to sub-frame information, generates a plurality of sequences of sub-frames of video data from the sequence of full frames of video data, a first sequence of the plurality of sequences of sub-frames of video data having a different center point within the sequence of full frames of video data than that of a second sequence of the plurality of sequences of sub-frames of video data. Post-processing circuitry, pursuant to supplemental information, modifies the plurality of sequences of sub-frames of video data to produce an output. Interface circuitry that delivers the output for subsequent presentation on the display.

A video processing system applies sub-frame processing to video data to generate both a first sequence of sub-frames of video data and a second sequence of sub-frames of video data. The first sequence of sub-frames of video data and the second sequence of sub-frames of video data are defined by metadata. The processing circuitry generates a third sequence of sub-frames of video data by combining the first sequence of sub-frames of video data with the second sequence of sub-frames of video data. Adaptive video processing circuitry receives encoded source video data, raw source video data, similar display metadata, target display metadata, and/or target display information. The adaptive video processing circuitry processes its input information to produce one or more outputs that include tailored metadata, encoded target display video data, target display video data, and DRM/Billing Signaling.

A content-adaptive video preview system (100) allows to go faster through a video than existing video skimming techniques. Thereby, a user can interactively adapt (S1) the speed of browsing and/or the abstraction level of presentation.

According to one embodiment of the invention, this adaptation procedure (S1) is realized by the following steps: First, differences between precalculated spatial color histograms associated with chronologically subsequent pairs of video frames said video file is composed of are calculated (S1a). Then, these differences and/or a cumulative difference value representing the sum of these differences are compared (S1b) to a predefined redundancy threshold (S(t)). In case differences in the color histograms of particular video frames (302a-c) and/or said cumulative difference value exceed this redundancy threshold (S(t)), these video frames are selected (S1c) for the preview. Intermediate video frames (304a-d) are removed and/or inserted (S1d) between each pair of selected chronologically subsequent video frames depending on the selected abstraction level of presentation. Thereby, said redundancy threshold value (S(t)) can be adapted (S1b′) for changing the speed of browsing and/or the abstraction level of presentation.

A method for providing adaptive video compression includes encoding a video stream in a first compressed format, storing the video stream in a storage device, retrieving the video stream from the storage device, decoding the video stream, encoding the video stream in a second compressed format, and storing the video stream in the storage device. Systems and other methods for providing adaptive video compression are also disclosed.

In a method of transmitting video data over a packet network, an input video stream is fed to a compressor that generates a compressed output stream. The compressor determines a target bit rate for the output stream based on desired picture quality. A traffic management unit a determines the available bit rate for the compressed data stream based on network condition. The output is adjusted if the target bit rate exceeds the granted bit rate.

The invention relates to a method of receiving an encoded bitstream wherein video content is segmented into portions based on predefined classifications or models. Based on the segment classifications, each segment or portion is encoded with a different encoder chosen from a plurality of encoders, each encoder being associated with a model. The chosen encoder is particularly suited to encoding the unique subject matter of the segment. The coded bit-stream for each segment includes information regarding which encoder was used to encode that segment. A matching decoder of a plurality of decoders is chosen using the information in the coded bitstream to decode each segment using a decoder suited for the classification or model of the segment. If scenes exist which do not fall in a predefined classification, or where classification is more difficult based on the scene content, these scenes are segmented, coded and decoded using a generic coder and decoder.

A system and method for providing a method for reducing artifacts in a video sequence of image frames is disclosed. The method and system include classifying scenes in the sequence of image frames, analyzing the content of the image frames and performing temporal filtering on the image frames. The method and system further include applying a set of rules to results of the classification and the content analysis to adapt characteristics of the temporal filtering for the scene.

The invention provides a self-adaptive video image enhancement method on the basis of brightness detection. The method of the invention detects the images under different illumination conditions and enhances the low-illumination images according to the detection result. When the images are detected, average values of brightness values of all sampling points of YUV-format images in a RGB colour space are taken as the brightness value of current frame of image. For each frame of image to be processed, if the brightness value of the frame of image is less than the prearranged brightness limit value of image under normal illumination, piecewise linearity is transformed for the value of Y-component of each pixel point in the area to be processed of the frame of image so as to improve the visible effect of the low-illumination image. In order to quicken the operation speed, the brightness values of all sampling points of the image in the RGB colour space are gained and the linear transform on the Y-component of the image under low illumination is operated in a form of table lookup. The method of the invention has small calculated quantities, meets the requirement of real-time performance and can be used for the processing of video images in video communication of mobile phones and televisions.

A system and method provide a video coding system for adaptively transcoding videos based on video coding complexity (VCC). A VCC engine of the system is configured to generate a measure of how difficult to encode a source video based on a trained VCC model. A video rate-distortion modeling engine of the system is configured to estimate a rate-distortion model and a scaling model. The VCC model, rate-distortion model and the scaling model are trained on a video corpus of the system. The trained VCC model, rate-distortion model and the scaling model are used by an adaptive bitrate transcoding sub-system to transcode a source video with an optimized bitrate and visual quality. The trained VCC model, rate-distortion model and the scaling model are further used by an adaptive resolution transcoding sub-system to transcode a source video with an optimized resolution and visual quality.

Methods and devices for a media processing is provided. In one respect, the methods can provide initiating a bandwidth throttle or a frame rate throttle when resources of a network exceed resources of client device. The methods of the present disclosure may also provide techniques for handling lost packets during transmission using wavelet coefficients.

An encoder circuit, a task scheduler circuit and a decoder circuit. The encoder circuit may be configured to (i) generate one or more first status signals in response to one or more report signals and (ii) perform video encoding tasks based on available central processing unit (CPU) cycles and memory bandwidth. The task scheduler circuit may be configured to (i) generate a control signal and the one or more report signals in response to the one or more first status signals. The decoder circuit may be configured to (i) generate one or more second status signals and (ii) perform concurrent decoding while the encoder circuit perform adaptive video encoding tasks in response to the control signal.

Methods, apparatus, systems, and software for implementing context adaptive video streaming using multiple streaming connections. Original video content is split into multiple bitstreams at a video streaming server and streamed to a video streaming client. Higher-importance video content, such as I-frames and the base layer for scalable video coder (SVC) content are streamed over a high-priority streaming connection, while lower-importance video content is streamed over a low-priority streaming connection. The high-priority streaming connection may employ a reliable connection protocol such as TCP protocol, while the lower-priority connection may employ UDP or a modified TCP protocol under which some portions of the bitstream may be dropped. Cross-layer context adaptive streaming may be implemented under which context data such as network context and video application context information may be considered to adjust parameters associated with implement one or more streaming connections.

The present invention is a system or method that facilitates smart decision makings at the client side for adaptive video streaming over a video delivery network by making use of perceptual video quality-of-experience predictions performed during the video preparation stage, at the video hosting or cache server side, or inside the video delivery network, and then transmitted to the client. Compared with prior art approaches of adaptive bitrate video streaming, the present invention can result in one or more of the following benefits: 1) save the overall bandwidth for the delivery of the video content without scarifying the client users' quality-of-experience; 2) create better overall visual quality-of-experience of the client users; 3) create smoother visual quality-of-experience of the client users; and 4) reduce the probability of rebuffering or stalling events at the client user side.