He Z.,InfraReDx |
Signal Processing: Image Communication
Due to their abilities to succinctly capture features at different scales and directions, wavelet-based decomposition or representation methods have found wide use in image analysis, restoration, and compression. While there has been a drive to increase the representation ability of these methods via directional filters or elongated basis functions, they still have been focused on essentially piecewise linear representation of curves in images. We propose to extend the line-based dictionary of the beamlet framework to one that includes sets of arcs that are quantized in height. The proposed chordlet dictionary has elements that are constrained at their endpoints and limited in curvature by system rate or distortion constraints. This provides a more visually natural representation of curves in images and, furthermore, it is shown that for a class of images the chordlet representation is more efficient than the beamlet representation under tight distortion constraints. A data structure, the fat quadtree and an algorithm for determining an optimal chordlet representation of an image are proposed. Codecs have been implemented to illustrate applications to both lossy and lossless low bitrate compressions of binary edge images, and better rate or ratedistortion performance over the JBIG2 standard and a beamlet-based compression method are demonstrated. © 2011 Elsevier B.V. All rights reserved. Source
Kannangara C.S.,Robert Gordon University |
Philp J.M.,Robert Gordon University |
Richardson I.E.,Robert Gordon University |
Bystrom M.,OneCodec |
De Frutos Lopez M.,Charles III University of Madrid
IEEE Transactions on Circuits and Systems for Video Technology
Fully configurable video coding is a novel approach to video compression in which a video decoder can be dynamically constructed based on a decoder description. This paper presents a new syntax for describing video decoder functionality and structure, namely, the decoder description syntax (DDS). The DDS is a platform-independent syntax that can define all aspects of a video decoder in terms of basic processing instructions. A DDS description of a video decoder may be coded and transmitted, and then executed by a generic processing platform, a universal video decoder (UVD). Any new or modified video decoding function may be described, communicated, and instantiated using the DDS, which makes it possible to rapidly implement new coding algorithms, to dynamically adapt the coding algorithm to suit the video data, and to efficiently implement multiple coding formats on one platform. We present examples of video decoding functions implemented in the DDS and show how these may be executed on a UVD. We demonstrate that flexible configuration, re-configuration, and decoding of video can be achieved using a real-time prototype UVD with functions transmitted and instantiated on-the-fly using the DDS. © 2010 IEEE. Source
OneCodec | Date: 2013-01-25
Systems and methods for encoding, sharing and decoding of multimedia data are disclosed. The systems and methods include multimedia decoding instantiation systems and multimedia processing engines which are capable of being upgraded or reconfigured to support a new or previously-unsupported compression format, without the need for platform-specific software or hardware upgrades. The systems and method further include transmission and storage of compressed data and functionality on a host device.
OneCodec | Date: 2014-03-05
Computer software and software application for use in storing, accessing, updating, editing, organising, tagging, sharing and transmitting data, documents, files, information, video and multimedia content via a global computer network; Software development tools and application programming interface (API) to enable integration of video content and functionality into websites, software applications and electronic devices. Electronic storage of files, documents, information, images and multimedia content; Computerised data and multimedia content storage and retrieval services. Telecommunications services, namely transmission of messages, data, video, and multimedia content over global communications networks, the internet and wireless networks; Providing user access to video and multimedia sharing portal; Providing digital program distribution of video and multimedia broadcasts via a global communications network, the internet and wireless networks. Hosting of digital content on the internet; Software as a service; Application service provider (ASP). On-line social networking services allowing users to create, share, tag and exchange user generated content.
OneCodec | Date: 2011-08-17
Systems and methods for encoding and decoding are disclosed. The systems and methods include multimedia decoder instantiation systems and multimedia processing engines which are capable of being upgraded or reconfigured to support a new or previously-unsupported compression format, without the need for platform-specific software or hardware upgrades.