摘要:
A system and method for efficiently performing motion estimation during temporal prediction for coding. When a new frame is presented for coding, an encoder may identify a limited number of pixel blocks within the input frame that are complex. The encoder may perform motion estimation searches to find reference frame(s) that are adequate prediction references for the complex pixel blocks. The encoder may search for prediction references for the remaining pixel blocks of the new frame, confining the search to the reference frame(s) that were selected as prediction references of the complex pixel blocks.
摘要:
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.
摘要:
A portable electronic device comprises a housing, a circuit board, a heat-conduction structure and a heat-dissipation structure. The circuit board is disposed in the housing. The heat-conduction structure is disposed in the housing and contacts the circuit board. The heat-dissipation structure is disposed outside the housing and connected to the heat-conduction structure, wherein heat is transmitted from the circuit board, passing the heat-conduction structure and the heat-dissipation structure to be dissipated out of the housing.
摘要:
Selecting a coding mode for coding video data by measuring a distortion sensitivity threshold for a pixel block, calculating a distortion threshold representative of the maximum distortion that may be effectively masked by the brightness and texture of the pixel block, estimating the distortion induced by coding the pixel block according to skip mode and coding the source pixel block with a predictive coding technique if the estimated distortion value exceeds the distortion threshold. The distortion sensitivity threshold may include, for example, a brightness value or a texture value. The contrast between the pixel block and the surrounding pixel blocks may also be considered such that if the contrast exceeds a contrast threshold calculated based on the measurement of brightness and texture, the source pixel block may be coded with a predictive coding technique even if the estimated distortion value does not exceed the distortion threshold.
摘要:
A connector for connecting a host and a peripheral device is disclosed. The connector includes N pin groups and each of the N pin groups has different pin length, wherein N is a positive integer and is greater than or equal to 3. The first pin group consists of ground pins and has the longest pin length.
摘要:
In a video coding/decoding system, reference picture caches in a video coder and decoder may be partitioned dynamically based on camera and background motion can lead to improved coding efficiency and coding quality. When a camera is fixed and therefore exhibits low motion, a system may allocate larger portions of the reference picture cache to storage of long term reference frames. In this case, foreground elements of an image (for example, a person) may move in front of a relatively fixed background. Increasing the number of long term reference frames can increase the chances that, no matter where the foreground elements are within a frame currently being coded, the reference picture cache will contain at least one frame that provides an adequate prediction match to background elements within the new frame. Thus the background elements uncovered in the current frame can be coded at high quality with a low number of bits. When a camera exhibits high motion, the system may allocate larger portions of the reference picture cache to storage of short term reference frames.
摘要:
A portable electronic apparatus comprises a housing, a circuit board, a heat-conduction structure and a heat-dissipation structure. The circuit board is disposed in the housing and comprises a substrate and a first electronic device, wherein the first electronic device is disposed on the substrate. The heat-conduction structure is disposed on the circuit board, and dissipates heat from the first electronic device. The heat-dissipation structure is disposed on the housing and connected to the heat-conduction structure, wherein the heat passes the heat-conduction structure and the heat-dissipation structure, and is dissipated out of the housing.
摘要:
Media authentication is facilitated. In connection with an example embodiment, media is authenticated using an encoded projection of the media that is decoded using the media as an input. A condition of authenticity of the media is determined based upon an indication of distortion of the media characterized by a decoding of the encoded projection.
摘要:
A portable electronic device comprises a housing, a circuit board, a heat-conduction structure and a heat-dissipation structure. The circuit board is disposed in the housing. The heat-conduction structure is disposed in the housing and contacts the circuit board. The heat-dissipation structure is disposed outside the housing and connected to the heat-conduction structure, wherein heat is transmitted from the circuit board, passing the heat-conduction structure and the heat-dissipation structure to be dissipated out of the housing.
摘要:
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.