摘要:
The described implementations relate to distributed network management and more particularly to enhancing distributed network utility. One technique selects multiple trees to distribute content to multiple receivers in a session where individual receivers can receive the distributed content at one of a plurality of rates. The technique further adjustably allocates content distribution across the multiple trees to increase a sum of utilities of the multiple receivers.
摘要:
Methods of fabricating a microlens and/or array of microlenses used to focus light on photosensors, by forming a protective coating over a microlenses precursor material, and etching the protective coating and microlens precursor material to obtain a predetermined shape.
摘要:
A random access read/write media format that enables segments of media to be read, written, accessed, and streamed in a non-sequential order. A media file is divided into a series of timeblocks TB0 to TBn-1 wherein each timeblock consists of media packets of a short non-overlapping time span. Each media packet in the media file is also divided into data units identifiable by data unit ID. A timeblock index table, with an entry for each timeblock in the series, and a media packet index field with a data unit ID entry for each data unit in the media packet (located in each timeblock header), are used to quickly locate portions of desired data. This two-level index hierarchy, the timeblock index table and the media packet index table, eases the locating, reading and writing of non-sequential media packets. The timeblock index allows data to be quickly found in terms of time, while the media packet index allows data to be quickly found by data unit ID.
摘要:
A “seamless multiplexer,” as described herein, provides a flexible and efficient system and method for multiplexing embedded coded bitstreams. Further, unlike the conventional JPEG 2000 standard, the seamless multiplexer is capable of decoding multiplexed encoded bitstreams without the need to use a demultiplexing aide as overhead in the encoded signal. In general, the seamless multiplexer provides a novel approach for multiplexing code block bitstreams by using a “decoder pointer,” for multiplexing multiple embedded bitstreams without the use of a demultiplexing aide. Consequently, the seamless multiplexer not only reduces any multiplexing overhead, but also allows much smaller granularity of access in reshaping the compressed input signal. In addition, in one embodiment, the seamless multiplexer also uses dependencies between coefficient blocks to further improve overall compression efficiency.
摘要:
Methods and systems for providing random access of structured media content are described. One aspect provides a novel file structure or “Vfile”, and method of using the same, for organizing and managing portions of a structured media content file that are or can be downloaded from a content provider such as a multimedia content server. The Vfile is configured to emulate a server file structure that a server uses to store structured media content files. The Vfile is established at a client location when a client accesses a structured media content file and is used to buffer and cache structured media content file portions. In addition, the Vfile includes one or more media management tags. The tags are used by the client to manage a cache of structured media content file portions that are downloaded from the server.
摘要:
In a networking environment, multiple end-users applications running on computing devices may operate behind a respective NAT device. Information transferred from one end-user application to another can be accomplished by establishing a connection from one private network. The NAT device translates information related to an end-user application operating within a private network to information that is understood by the public network environment. This translated information is communicated to the associated NAT device of the intended recipient. The NAT device of the intended recipient translates the public environment related information to information for the end-user in the private network.
摘要:
A lens is formed to support and tilt at least one microlens formed on the lens. The degree and direction of slope of the microlens can be controlled based on desired focal characteristics to direct light to or from a pixel of a pixel array.
摘要:
A multiple protection group (MPG) erasure-resilient coding method for constructing MPG codes for encoding and decoding data. The MPG codes constructed herein protect data chunks of data in multiple protection groups and subgroups. In general, the MPG erasure-resilient codes are constructed by locating data chunks into multiple protection groups and assigning at least one parity chunk to each protection group. Basic MPG codes are constructed from existing Maximum Distance Separable (MDS) codes by splitting at least some of the parity chunks into local parities for each of the multiple protection groups and projecting local parities onto each of the groups. Generalized MPG codes have a Maximally Recoverable property that can be used to determine whether an erasure pattern is recoverable or unrecoverable. Generalized MPG codes can recover any erasure pattern that is recoverable.
摘要:
A high-rate Reed-Solomon erasure resilient codes (ERC) system and method for generating and implementing Reed-Solomon erasure-resilient codes for use in high-rate applications. High-rate applications are applications where the number of coded messages is significantly higher (such as an order of magnitude) than the number of original messages. The Reed-Solomon ERC system uses a scalar vector multiplication and addition technique and a direct inversion technique. The direct inversion technique uses specific generator matrices, including a modified Vandermonde Matrix and a Cauchy Matrix, to directly calculate an inverse of the sub-generator matrix of receiving ERC-coded messages. The scalar vector multiplication and addition technique generates high-rate Reed-Solomon codes and performs scalar vector multiplication and addition on the Galois Field for the Reed-Solomon erasure encoding/decoding operations. In effect, the Reed-Solomon codes are “tuned” for use in the high-rate environment.
摘要:
Methods and apparatus are provided. An image sensor has an array of light sensing elements and a transparent cover overlying the array of light sensing elements. The cover has a first roughened surface facing the array of light sensing elements and a second roughened surface facing away from the light sensing elements.