Patent
High efficiency data compressed image encoding
Naofumi Yanagihara,Michio Nagai +1 more
- 05 Jun 1992
69
TL;DR: In this paper, the orthogonal transform of the image data samples in each block is quantized with the same quantizing step to produce weighted, quantized conversion coefficients having a weighting factor that is a function of the visual activity of that block.
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Abstract: Image data is encoded into sync blocks of fixed length and maximum data volume by dividing a vertical interval of image data samples, such as a field or frame of samples, into a plurality of blocks and deriving the orthogonal transform of the image data samples in each block. A block of conversion coefficients that are produced by the orthogonal transform are quantized with the same quantizing step to produce weighted, quantized conversion coefficients having a weighting factor that is a function of the visual activity of that block. Then, the weighted, quantized conversion coefficients of a block are variable length coded and the variable length codes of a predetermined number of blocks are combined into a sync block of fixed length.
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Citations
Patent
Adaptive encoding of a sequence of still frames or partially still frames within motion video
Charles Edward Boice,Barbara A. Hall,Agnes Yee Ngai,Charles John Stein,Everett G. Vail,Edward F. Westermann +5 more
- 20 Mar 1998
TL;DR: In this paper, a pre-encode statistics measurement unit is employed to derive statistics on each frame of the sequence of video frames to be encoded, and an encoding engine employs the at least one controllable parameter to encode the still frame so that pulsation artifacts are prevented between still frames of the series of still frames.
55
Patent
System and method for providing video content associated with a source image to a television in a communication network
Robert B. Sigmon,Lena Y. Pavlovskaia,Airan Landau +2 more
- 09 Jun 2006
TL;DR: In this article, a system and method for processing video content associated with a source image for display on a television is presented, where the source image, such as a web page, and its associated (e.g., linked) video content are retrieved and separately encoded.
51
Patent
Image data compression
Nicholas Ian Saunders,Clive Henry Gillard +1 more
- 31 Jul 1997
TL;DR: In this article, the authors propose a block truncator, which can truncate one or more of the blocks of compressed data by discarding at least higher spatial frequency image data, responsive to a detection that a current group of the compressed data contains more data than the data capacity of the data formatter.
50
Patent
Method and system for video encoding using a variable number of B frames
Adriana Dumitras,Barin Geoffry Haskell +1 more
- 19 Nov 2004
TL;DR: In this article, an effective method for dynamically selecting the number of I, P and B frames during video coding is proposed, which yields a variable number of B frames to be coded between any two stored pictures.
49
Patent
Coding apparatus and decoding apparatus for transmission/storage of information
Yoshihiro Kikuchi,Toshiaki Watanabe,Kenshi Dachiku,Takeshi Chujoh,Takeshi Nagai +4 more
- 05 May 2006
TL;DR: In this paper, an output coding apparatus includes a coder for coding an inputted bitstream to an error correction and/or detection code composed of information bits and check bits; and a bitstream assembling section for assembling an outputted bit stream by inserting a synchronization code at any one of a plurality of synchronization code insertion positions previously determined in the output stream.
49
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Robert D. Widergren,Wen-Hsiung Chen,Stanley C. Fralick,Andrew G. Tescher +3 more
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TL;DR: In this article, a digital video compression and expansion system and its methods for compressing and expanding digitalized video signals in real time at rates up to NTSC color broadcast rates are disclosed.
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Patent
Highly efficient coding apparatus
Tetsujiro Kondo,Kenji Takahashi +1 more
- 27 Nov 1990
TL;DR: In this article, a highly efficient coding apparatus for coding digital video data is proposed, which consists of means for receiving the digital data represented by respective picture element data of first predetermined bits, means for determining at least one elementary picture element for each block, means (41, 43) for predicting values of respective ones of subject picture element (MPE) data, means detecting respective predictive errors of the predicted values from the real values of the picture element values, means 45) for determining if each predictive error is greater than a threshold value, and means for generating flag data by the
283
Patent
Orthogonal transform coding system for image data
Tomoko Aono,Masao Izumi +1 more
- 25 Apr 1989
TL;DR: An orthogonal transform coding system for images which orthogonally transforms image data to spatial frequencies and divides the domain of the spatial frequencies into low and high frequency domains using a plurality of domain patterns prepared in advance is described in this article.
153
Patent
Image data coding apparatus and coding method
Chihiro Nakagawa,Hiroyuki Fukuda,Hiroshi Sasaki,Chikako Mogi,Hidetoshi Yamada +4 more
- 23 Oct 1990
TL;DR: In this paper, an orthogonal transform circuit is used to transform the image data of one screen and generate a transformed output, and a quantizing circuit quantizes the transformed output with a predetermined temporary first quantization width upon reception of the first control signal and generates a first quantized output.
84
Patent
Orthogonal transform coding apparatus for reducing the amount of coded signals to be processed and transmitted
Tatsuro Juri
- 08 Jun 1990
TL;DR: An orthogonal transform coding device assembles sample values of the input signals and forms a large block as discussed by the authors, which is then divided into a plurality of small blocks and the sample values are subjected to the Orthogonal Transform coding for every small block.
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