 Remote control |
| According to one aspect of the present invention, there is provided a slave receiver for detecting ... |
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| Routing system in data communication with frame relay procedure control |
| What is claimed is: 1. A routing system for use in each station of first through N-th exchange ... |
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| Method and apparatus for determining the assignment of a mobile station to equipment lists |
| It is the object of the invention to determine which equipment list a mobile station is assigned to.... |
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| Apparatus and method for billing in a wireless communication system |
| In order to address this need and others, the present invention provides a method and an apparatus ... |
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| High speed squelch circuit |
| It is, accordingly, the principle object of this invention to provide a novel and improved squelch ... |
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| Muting circuit |
| What is claimed is: 1. In a receiver including carrier selection means for tuning to a selected ... |
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| Data eye monitor |
| I claim: 1. A data eye monitor for a data input signal comprising: first means for comparing said ... |
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| Single-sideband radiotelephone system |
| The present invention relates to a single-sideband radio system which may be used for ... |
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| Wideband FM modulator and AFC control loop therefor |
| The present invention pertains to an improved digital frequency discriminator for use in a wideband ... |
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| Extremely accurate automatic frequency control circuit and method therefor |
| The above and other objects are achieved by an automatic frequency control circuit which receives ... |
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Fixed or adaptive deinterleaved transform coding for image coding and intra coding of video
| Details |
Inventors: Puri, Atul; Schmidt, Robert Louis; Wus, John;
Assignee: AT&T Corp (New York, NY)
Primary Examiner: Britton; Howard
Assistant Examiner:
Attorney, Agent or Firm:
A coding strategy efficiently codes intra (macroblocks, regions, pictures, VOP) data. This strategy uses two basis approaches, a Fixed Deinterleaved Transform Coding approach, and an Adaptive Deinterleaved Transform Coding approach. Furthermore, within each approach, two types of coders are developed. One coder operates on an entire picture or VOPs and the other coder operates on small local regions. Using coders and decoders of the present invention, efficient coding at a range of complexities becomes possible, allowing suitable tradeoffs for a variety of applications. |
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DETAILED DESCRIPTION The present invention solves this problem by using a deinterleaving step prior to the transformation step in combination with a suitable quantization technique.
Deinterleaving is a more flexible form of subsampling.
The method and apparatus of the present invention thus achieve the coding efficiency of wavelet coding, at the expense of only a small improvement in complexity over traditional transform coding but at a significantly reduced complexity relative to wavelet coding.
The present invention includes two forms of deinterleaving in the encoding process.
According to the present invention, improved intra coding is achieved by fixed or adaptive deinterleaving, transform (e.
g.
, DCT), quantization with extensions and entropy encoding.
(e.
g.
, Variable Length Encoding, VLE, or Arithmetic Encoding, AE).
According to the present invention, there are two main approaches to coding.
The first uses fixed deinterleaving, and the second uses adaptive deinterleaving.
It now becomes possible as a result of the present invention to use a simple transform coding method that achieves high coding efficiency using a fixed deinterleaving approach, or to use a slightly more complex method that produces somewhat better results based on an adaptive deinterleaving approach, and yet both of these approaches are less complex than wavelet coding and achieving the same or nearly the same coding efficiency.
According to advantageous implementations of the present invention, for each approach, two variations exist, one intended for separate motion/texture part of the MPEG-4 Verification Model (VM) (global transform) coding and the other intended for combined motion/texture part of the VM (local transform) coding.
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Multiplexer-related 
