Patent
Image signal band compressing system for digital video tape recorder
Seung K. Pack,Tae Y. Chung +1 more
Reads0
Chats0
TLDR
In this paper, an intraframe and an interframe process is defined such that the present frame image data is compressed in a variable length compressing manner by way of two-dimensional discrete coding transform.Abstract:
The image signal band compressing method employs a three-dimensional motion compensating technique, an intraframe and an interframe processes which are alternatively executed. The transfer rate of the intraframe to the interframe is set to 4:1 in a unit of fixed length. The intraframe process is defined such that the present frame image data is compressed in a variable length compressing manner by way of two-dimensional discrete coding transform. The interframe process is defined such that motion data is estimated by comparing the present frame and the preceding frame, the present frame is expected on the basis of the motion data and the difference data between the motion compensated image data and the present frame data.read more
Citations
More filters
Patent
Watermark embedder and reader
TL;DR: A watermark system includes an embedder, detector, and reader as mentioned in this paper, which can be applied to mark graphical models, blank paper, film and other substrates, texturing objects for ID purposes, etc.
Patent
Computer system linked by using information in data objects
TL;DR: In this paper, various improvements to steganographic systems, and applications, are disclosed, such as facilitating scale and rotation registration, improving robustness, and representing data by patterned bit cells whose energy in the spatial domain facilitates decoding registration.
Patent
Methods for surveying dissemination of proprietary empirical data
TL;DR: In this article, an automated system checks networked computers such as computers on the internet, for watermarked audio, video, or image data, and provides a report listing the location of such audio or video data, provided to the proprietor(s) thereof identified by the watermark information.
Patent
Steganography methods employing embedded calibration data
TL;DR: In this article, an identification code signal is impressed on a carrier to be identified (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be discerned and the carrier thereby identified.
Patent
Integrating digital watermarks in multimedia content
TL;DR: In this paper, a copy control method for decoding auxiliary data from media signals in multimedia content decodes watermarks from different media signals and uses the watermarks to control processing of the multimedia content.
References
More filters
Patent
Method and apparatus for encoding/decoding image data
TL;DR: In this article, a plurality of compute modules, in a preferred embodiment, for a total of four compute modules coupled in parallel, are used for processing video data for compression/decompression in realtime.
Patent
Adaptive transform coding using variable block size
TL;DR: In this article, an adaptive transform coding algorithm for a still image utilizes a quadtree based variable block size discrete cosine transform to achieve a better tradeoff between bit rate and image quality.
Patent
Digital image coding using random scanning
Tristan Savatier,Alain Delpuch +1 more
TL;DR: In this article, a video signal coder blocks of pixels are generated, scanned in a pseudo-random order, and transformed blocks of coefficients which are stored in a buffer are quantized individually by the use of a quantization level.
Patent
Adaptive transform coding of still images
Cheng-Tie Chen,Didier J. LeGall +1 more
TL;DR: In this article, an adaptive transform coding algorithm for a still image is proposed, where the image is divided into small blocks of pixels and each block of pixels is transformed using an orthogonal transform such as a discrete cosine transform.
Patent
Adaptive zonal coder
TL;DR: In this article, a two-dimensional block of image data in a spatial domain is transformed by a transform coder, resulting in a 2D array of activity coefficients in a frequency domain.