Patent application number | Description | Published |
20120195356 | RESOURCE USAGE CONTROL FOR REAL TIME VIDEO ENCODING - A video coding system and method that dynamically controls coding parameters to satisfy a resource usage requirement. A resource controller may set parameters or parameter thresholds to change the coding complexity of the video coding system and to effectuate a change in the resource usage rate. Parameters may include the frame rate, the frame resolution, the bit rate, or pixel block sizes. A parameter or parameter threshold adjustment may be based on system resource data, for example, power consumption, CPU usage, fan speed, battery status, input video statistics, coding latency, and other video encoder internal states. | 08-02-2012 |
20120195364 | DYNAMIC MODE SEARCH ORDER CONTROL FOR A VIDEO ENCODER - A system and method for coding video data wherein a coding mode decision process may be dynamically adjusted according to any of a plurality of factors including video image content, image complexity, motion, channel conditions, the status of the video system components, or other relevant factor. Each of a plurality of potential coding modes may be assigned a weight reflecting an estimation of the likelihood that the coding mode will result in quality image data. The coding mode decision process may then be altered by changing the order of coding modes attempted according to the assigned weight. Code removal and early termination may further alter the coding mode decision process. | 08-02-2012 |
20120307904 | PARTIAL FRAME UTILIZATION IN VIDEO CODECS - Embodiments of the present invention provide techniques for efficiently coding/decoding video data during circumstances where a decoder only requires or utilizes a portion of coded frames. A coder may exchange signaling with a decoder to identify unused areas of frames and prediction modes for the unused areas. An input frame may be parsed into a used area and an unused area based on the exchanged signaling. If motion vectors of the input frame are not limited to the used areas of the reference frames, the unused area of the input frame may be coded using low complexity. If the motion vectors of the input frame are limited to the used areas of the reference frames, the pixel blocks in the unused area of the input frame may not be coded, or the unused area of the input frame may be filled with gray, white, or black pixel blocks. | 12-06-2012 |
20130034151 | FLEXIBLE CODEC SWITCHING - A system and method for switching between multiple encoders or decoders may be implemented to quickly and seamlessly transfer coding operations between two encoders. Before switching from a first encoder to a second encoder, the second encoder is initialized and updated with a copy of the necessary information from the first encoder. Similarly when switching from a first decoder to a second decoder, the second decoder is initialized and the necessary information from the first decoder is passed to the second decoder. A controller may monitor the system to identify a condition that would trigger an encoder switch and identify the encoder that best suits the system conditions. According to an embodiment, a shared memory unit accessible by either encoder may store the initialization information. According to an embodiment, a shared decode unit accessible by either encoder may transmit decoded frames between encoders. | 02-07-2013 |
20130222515 | SYSTEM AND METHOD FOR OPTIMIZING VIDEO CONFERENCING IN A WIRELESS DEVICE - A wireless device described herein can use information on data flow, in addition to indications from the physical network, to decide on suitable bandwidth usage for audio and video information. This data flow information is further used to determine an efficient network route to use for high-quality reception and transmission of audio and video data, as well as the appropriate time to switch between available network routes to improve bandwidth performance. | 08-29-2013 |
20130235928 | ADVANCED CODING TECHNIQUES - Embodiments of the present invention provide techniques for efficiently coding/decoding video data during circumstances when constraints are imposed on the video data. A frame from a video sequence may be marked as a delayed decoder refresh frame. Frames successive to the delayed decoder refresh frame in coding order may predictively coded without reference to frames preceding the delayed decoder refresh frame in coding order. The distance between the delayed decoder refresh frame and the successive frames may exceed a distance threshold. Frames successive to a current frame in decoding order may be decoded without reference to frames preceding the current frame in decoding order. The distance between the current frame and the successive frames may exceed a distance threshold. | 09-12-2013 |
20130235931 | MASKING VIDEO ARTIFACTS WITH COMFORT NOISE - A system and method is presented to mask artifacts with content-adaptive comfort noise. Encoder side analysis may determine initial comfort noise characteristics. Noise parameters may then be developed for each frame or sequence of frames that define comfort noise patches that mask the artifacts. At the decoder, a comfort noise patch can be fetched from memory or created based on the amplitude and spatial characteristics of the comfort noise specified in the noise parameters. The noise patch may additionally be scaled or otherwise adjusted to accommodate the capabilities and/or limitations of the specific decoder. | 09-12-2013 |
20130329799 | PREDICTIVE VIDEO CODER WITH LOW POWER REFERENCE PICTURE TRANSFORMATION - Video coders may perform perspective transformation of reference frames during coding in a manner that conserves processing resources. When a new input frame is available for coding, a camera position for the input frame may be estimated. A video coder may search for reference pictures having similar camera positions as the position of the input frame and, for each reference picture identified, the video coder may perform a prediction search to identify a reference picture that is the best prediction match for the input frame. Once the video coder identifies a reference picture to serve as a prediction source for the input frame, the video coder may derive a transform to match the reference frame data to the input frame data and may transform the reference picture accordingly. The video coder may code the input frame using the transformed reference picture as a prediction reference and may transmit coded frame data and the camera position of the input frame to a decoder. Thus, the video coder may perform derivation and execution of transforms on a limited basis which conserves system resources. | 12-12-2013 |
20140064160 | Synchronizing Uplink and Downlink Transmissions in a Wireless Device - Synchronizing uplink and downlink transmissions by a wireless user equipment (UE) device. A connection with a network may be established via a wireless link with a cell. The UE may operate in an active state during first periods of time in which uplink or downlink communications may be performed between the UE and the network. The UE may operate in a reduced-power state during second periods of time in which uplink and downlink communications are not performed. The first periods of time may alternate with the second periods of time in a repeating manner. Uplink data generated by the UE may be buffered during second periods of time and transmitted during first periods of time. Buffering uplink data in this manner may prevent the UE from immediately transitioning from the reduced-power state to the active state to transmit uplink data, which may conserve battery of the UE. | 03-06-2014 |
20140064165 | RADIO POWER SAVING TECHNIQUES FOR VIDEO CONFERENCE APPLICATIONS - In video conferencing over a radio network, the radio equipment is a major power consumer especially in cellular networks such as LTE. In order to reduce the radio power consumption in video conferencing, it is important to introduce an enough radio inactive time. Several types of data buffering and bundling can be employed within a reasonable range of latency that doesn't significantly disrupt the real-time nature of video conferencing. In addition, the data transmission can be synchronized to the data reception in a controlled manner, which can result in an even longer radio inactive time and thus take advantage of radio power saving modes such as LTE C-DRX. | 03-06-2014 |
20140269932 | CODEC TECHNIQUES FOR FAST SWITCHING - A video streaming method for transitioning between multiple sequences of coded video data may include receiving and decoding transmission units from a first sequence of coded video data. In response to a request to transition to a second sequence of coded video data, the method may determine whether a time to transition to the second sequence of coded video data can be reduced by transitioning to the second sequence of coded video data via an intermediate sequence of coded video data. If the time can be reduced, the method may include receiving at least one transmission unit from an intermediate sequence of coded video data that corresponds to the request to transition, decoding the transmission unit from the intermediate sequence, and transitioning from the first sequence to the second sequence via the decoded transmission unit from the intermediate sequence. | 09-18-2014 |
20140321534 | VIDEO PROCESSORS FOR PRESERVING DETAIL IN LOW-LIGHT SCENES - Video coding systems and methods are provided that protect against various artifacts (e.g., banding artifacts) in decoded frame content. The embodiments to protect against introducing artifacts include pre-processing the input video frame, controlling the encoding parameters and/or post-processing the decoded video frame. A method for encoding a frame may include calculating a dark-scene score for the frame based on measured statistics of the frame. The dark-scene score may be compared to a threshold to determine if the banding artifacts may be present in the frame. Based on the comparison, filtering parameters for the frame may be altered to reduce the amount of noise filtered from the frame. The frame may be filtered based on the altered filtering parameters and encoded. | 10-30-2014 |
20140362159 | ADAPTIVE POST-PROCESSING FOR MOBILE VIDEO CALLING SYSTEM - A system may include a receiver, a decoder, a post-processor, and a controller. The receiver may receive encoded video data. The decoder may decode the encoded video data. The post-processor may perform post-processing on frames of decoded video sequence from the decoder. The controller may adjust post-processing of a current frame, based upon at least one condition parameters detected at the system. | 12-11-2014 |
20140362162 | RADIO POWER SAVING TECHNIQUES FOR VIDEO CONFERENCE APPLICATIONS - In video conferencing over a radio network, the radio equipment is a major power consumer especially in cellular networks such as LTE. In order to reduce the radio power consumption in video conferencing, it is important to introduce an enough radio inactive time. Several types of data buffering and bundling can be employed within a reasonable range of latency that doesn't significantly disrupt the real-time nature of video conferencing. In addition, the data transmission can be synchronized to the data reception in a controlled manner, which can result in an even longer radio inactive time and thus take advantage of radio power saving modes such as LTE C-DRX. | 12-11-2014 |
20140362919 | COHERENCE GROUPS: REGION DESCRIPTORS FOR LOW BIT RATE ENCODING - The invention is directed to an efficient way for encoding and decoding video. Embodiments include identifying different coding units that share a similar characteristic. The characteristic can be, for example: quantization values, modes, block sizes, color space, motion vectors, depth, facial and non-facial regions, and filter values. An encoder may then group the units together as a coherence group. An encoder may similarly create a table or other data structure of the coding units. An encoder may then extract the commonly repeating characteristic or attribute from the coding units. The encoder may transmit the coherence groups along with the data structure, and other coding units which were not part of a coherence group. The decoder may receive the data, and utilize the shared characteristic by storing locally in cache, for faster repeated decoding, and decode the coherence group together. | 12-11-2014 |
20140362927 | VIDEO CODEC FLASHING EFFECT REDUCTION - A system may include a detector, a controller, and an encoder. The detector may receive data from video input to detect a group of pixels in a video sequence, and may determine whether the group of pixels needs additional bits for encoding. The controller may determine the number of bits for the additional bits and may allocate the additional bits with the number of bits in a data stream. The encoder may by controlled by the controller to encode the group of pixels with the additional bits, and output to the encoded output. | 12-11-2014 |
20150016804 | TRICK PLAY IN DIGITAL VIDEO STREAMING - System and methods for improved playback of a video stream are presented. Video snippets are identified that include a number of consecutive frames for playback. Snippets may be evenly temporally spaced in the video stream or may be content adaptive. Then the first frame of a snippet may be selected as the first frame of a scene or other appropriate stopping point. Scene detection, object detection, motion detection, video metadata, or other information generated during encoding or decoding of the video stream may aid in appropriate snippet selection. | 01-15-2015 |