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| Number | Title | Issue Date |
| 6160846 | Apparatus and method for optimizing the rate control in a coding system A method and apparatus for selecting a quantizer scale for each macroblock to maintain the overall quality of the video image while optimizing the coding rate. A quantizer scale is selected for each macroblock such that target bit rate for the picture is ... | 12/12/2000 |
| 6157746 | Apparatus and method for encoding wavelet trees generated by a wavelet-based coding method An apparatus and a concomitant method is disclosed for encoding wavelet trees in a wavelet-based coding technique, which addresses both balanced and unbalanced wavelet trees and increases the overall coding efficiency.... | 12/05/2000 |
| 6154493 | Compression of color images based on a 2-dimensional discrete wavelet transform yielding a perceptually lossless image What is disclosed is a method that includes splitting raw image data into a plurality of channels including color plane difference channels, and then compressing separately each of these channels using a two-dimensional discrete wavelet transform, the com... | 11/28/2000 |
| 6091777 | Continuously adaptive digital video compression system and method for a web streamer A cost effective continuously adaptive digital video system and method for compressing color video data for moving images. The method describes capturing an analog video frame and digitizing the image into a preferred source input format for compression u... | 07/18/2000 |
| 6084912 | Very low bit rate video coding/decoding method and apparatus A method and apparatus for coding motion video (images) that produces very low bit rate video representation and minimizes the amount of data needed to be transferred to the decoder. The apparatus comprises a 2-pass segmentation section, a 2-stage motion ... | 07/04/2000 |
| 5953460 | Image encoding method and an image encoder wherein a one-dimensional signal having the fastest energy conversion rate is selected and outputted as a coded signal An image signal is transformed by at least two different mathematical transformations to obtain at least two different transformed signals. A selected one of the transformed signals is quantized and coded, the selection being made so as to minimize the si... | 09/14/1999 |
| 5937097 | Motion detection method and apparatus The present invention provides a method and apparatus for detecting motion in an input sequence of images. Each image comprises a number of lines and each line has a number of pixels. Values of a region of pixels of a current image are transformed to dete... | 08/10/1999 |
| 5900911 | Signal encoding method separating a quantized signal into a binary signal and a sign and intensity signal A signal is quantized, and a quantized signal is thereby obtained. The quantized signal is separated into a binary signal, which represents whether the signal values of the quantized signal are equal to zero or are other than zero, and a sign and intensit... | 05/04/1999 |
| 5838377 | Video compressed circuit using recursive wavelet filtering A video compression circuit comprises an input that receives an input video signal. A memory buffer, coupled to the input, temporarily stores a portion of the input video signal. A single horizontal filter bank, coupled to the memory buffer, high-pass and... | 11/17/1998 |
| 5798794 | Wavelet transform subband coding with frequency-dependent quantization step size A subband coding method for dividing a luminance signal or a color difference signal in a digital video signal into a plurality of frequency bands in vertical and horizontal directions in a spatial frequency region by executing two-dimensional multilayer ... | 08/25/1998 |
| 5684894 | Scale specific and robust line/edge encoding of images Prescribed attributes such as lines and edges are detected in an image wherein the image is digitized to a prescribed spatial and a digital encoding resolution. Directional energy and positions of linear structures in the image are then estimated, and glo... | 11/04/1997 |
| 5657085 | Wavelet transform coding method An improved coding performance for wavelet transform coding. The method comprises: two-dimensional wavelet transforming an input picture signal to output transform coefficients; two-dimensionally arranging the transform coefficients; quantizing the arrang... | 08/12/1997 |
| 5585933 | Recording and/or reproducing apparatus for recording and/or reproducing image data compressed according to different compressing methods A recording and/or reproducing apparatus for recording and/or reproducing image signals compressed according to different compressing methods. This recording and/or reproducing apparatus includes a compressing circuit for compressing first image data acco... | 12/17/1996 |
| 5563960 | Apparatus and method for emphasizing a selected region in the compressed representation of an image In certain image analysis applications, it is desirable to compress the image while emphasizing a selected region of the image. The invention is a means for to allocating more bits, and thus better quality in the decoded image, to the selected region at t... | 10/08/1996 |
| 5420636 | Apparatus for and method of transmitting video signal The video signal containing portions locally unsuitable for coding is divided into a plurality of components and is coded by a method such as a Wavelet transform and then is transmitted. In this case, a first quantizing means controls a quantization chara... | 05/30/1995 |
| 5398067 | Picture data processing apparatus A picture data processing apparatus, which is suitably applied, for instance, to a television conference system in which picture data are transmitted in the form of codes prevents, deterioration of the picture quality even if an edge in the picture data e... | 03/14/1995 |
