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| Number | Title | Issue Date |
| 5220422 | 3×3 sub-band coding/decoding circuit for video signals and method thereof A 3×3 sub-band coding-decoding circuit for coding and decoding video signals and a method thereof includes: a horizontal dividing section, a vertical dividing section, a vertical synthesizing section, and a horizontal synthesizing section. The transmitti... | 06/15/1993 |
| 5218435 | Digital advanced television systems Image quality is improved in high definition television using multi-scale representation of motion compensated residuals. The bandwidths of the subband filters vary with the frequency band and the total number of coefficients in the multi-scale-represente... | 06/08/1993 |
| 5216719 | Subband coding method and encoding/decoding system A subband coding method and encoding/decoding system suitable for a high definition television which is possible to compress data more effectively. Frequency band of input data is analyzed into a high-band component and a low-band component in the two-dim... | 06/01/1993 |
| 5214502 | Compression of video signals To enable a digital composite color video signal (NTSC or PAL) to be compressed directly, that is without dividing it into its components and compressing the components separately, the digital composite color video signal is decorrelated, for example by s... | 05/25/1993 |
| 5202760 | Information compression method and device for compatible decoding of a group of television signals with increasing resolutions The method of the present invention is directed to information compression which allows for compatible decoding of a group of television signals with increasing resolutions. According to the present invention, a first step, at the transmitter, involves st... | 04/13/1993 |
| 5136374 | Geometric vector quantization A geometric vector quantizer coding technique is illustrated in the context of a full motion video coder based on a three-dimensional sub-band framework. The original image data is decomposed into different spatial-temporal frequency bands and based on th... | 08/04/1992 |
| 5128754 | Apparatus and method for encoding and decoding video A method and an apparatus are disclosed for encoding and decoding video to achieve bandwidth compression. In one embodiment, frames of a video signal are divided into a multiplicity of tiles. The picture content of each tile is separated into a plurality ... | 07/07/1992 |
| 5128757 | Video transmission system using adaptive sub-band coding A video signal having a bandwidth on the order of 37 MHz is subjected to adaptive sub-band coding for transmission through a standard 6 MHz NTSC television channel. During each frame of the video signal a plurality of blocks of sub-band coefficients, each... | 07/07/1992 |
| 5115309 | Method and apparatus for dynamic channel bandwidth allocation among multiple parallel video coders A dynamic channel allocation unit for specifying a bit rate for each video coder in a set of parallel video coders comprising an overall video coder is disclosed. The dynamic channel allocation unit is supplied from each individual video coder with an ave... | 05/19/1992 |
| 5107348 | Temporal decorrelation of block artifacts A video signal comprising a successive series of frames is sub-band coded to derive a plurality of groups of coefficients for each frame. Each group of coefficients comprises a spectral representation of the video content of a respective portion of the fr... | 04/21/1992 |
| 5097331 | Multiple block-size transform video coding using an asymmetric sub-band structure A sub-band coder for video signals is disclosed, which is easily realizable in VLSI due to its simple structure. The coder uses sets of two-tap finite impulse response (FIR) filters having equal-magnitude coefficients to decompose the video signal at mult... | 03/17/1992 |
| 5067015 | Method of processing video image data for use in the storage or transmission of moving digital images A method of processing video image data for use in the storage or transmission of moving digital video images, includes decomposition of each frame image into an equivalent set of sub-images containing information on different length scales, derivation of... | 11/19/1991 |
| 5063444 | High definition television arrangement with signal selections adapted to the available transmission capacity A high definition television system that is characterized by low transmission bandwidth is achieved by removing redundancies in the signal, encoding the remaining signals, and transmitting the encoded signal in a manner that is most compatible with the ap... | 11/05/1991 |
| 5048111 | Hybrid subband-based hierarchical storage and display method for high resolution digital images in a multiuse environment An image processing method is described for the hierarchical storage and display of high resolution digital images in a multiuse environment. The method makes reduced resolution versions of the original image available for quick display on video monitors ... | 09/10/1991 |
| 5043808 | High definition television arrangement employing motion compensated prediction error signals A high definition television system that is characterized by low transmission bandwidth is achieved by in a manner removing much of the redundancies in the signal, efficiently encoding the remaining signals, and transmitting the encoded signal in a manner... | 08/27/1991 |
| 4987480 | Multiscale coding of images Image encoding apparatus and methods include recursively decomposing the luminance values of sequential frames into spatio-temporal spectral components, by quadrature mirror filter (QMF) processing of the luminance values. The filtered signals are subsamp... | 01/22/1991 |
| 4969040 | Apparatus and method for differential sub-band coding of video signals A method and apparatus for achieving a high compression of a video signal. The PEL-by-PEL difference between an input signal consisting of digital PEL values of a scanned video signal and a motion compensated interframe prediction signal is decomposed int... | 11/06/1990 |
| 4943855 | Progressive sub-band image coding system A system for reducing image data redundancies through progressive sub-band coding. The image is separated into a selected plurality of sub-bands, and the sub-band with the largest non-redundant data content is chosen and used to predict the data in the ot... | 07/24/1990 |
| 4918524 | HDTV Sub-band coding using IIR filter bank A technique for the sub-band decomposition and reconstruction of video signals is disclosed. In an illustrative embodiment of the present invention, each field of a video signal is decomposed into sub-bands utilizing a polyphase filter bank unit including... | 04/17/1990 |
| 4829378 | Sub-band coding of images with low computational complexity A class of filters for use in connection with the sub-band coding of a video signal is disclosed. The filters are of short length, symmetric and have coefficients in the form of an integer divided by a power of two. The filters may be implemented with a m... | 05/09/1989 |
| 4817182 | Truncated subband coding of images Image data is analyzed in a number of iterated analysis procedures, using two-dimensional quadrature mirror filters to separate low-pass spatial filter response component and three differently oriented high-pass spatial filter response components, which f... | 03/28/1989 |
| 4713776 | System for simultaneously coding and decoding a plurality of signals In a multi-channel system, a transmitting encoder includes an adaptive quantizer for each channel, an adaptive bit-allocator operating common to all channels using an update algorithm, and a multiplexer which rearrange signals responsive to bit-allocation... | 12/15/1987 |
