 Switching device for detecting interruptions in transmission lines |
| The object of the present invention is to provide a device for switching the transmission lines, ... |
|
| Method and device for controlling radiation |
| OF THE INVENTION Referring now to FIGS. 1 through 4, which describe an embodiment of the device of ... |
|
| Automatic dialer with a programmable pause |
| Against the foregoing background, a general aim of the present invention is to provide methods and ... |
|
| Teletype compatible facsimile recorder |
| I claim: 1. A facsimile system for recording graphic signals comprising: a facsimile signal channel ... |
|
| Magnetic recording head assembly support with a sinuous gimbal spring |
| OF THE DRAWINGS Reference should now be had to the FIGS. 1 to 9 for a description of the preferred ... |
|
| Automatic reverse cassette type recorder |
| OF THE PREFERRED EMBODIMENT There will now be described by reference to the accompanying drawing ... |
|
| Continuously operating centrifuge drum for the sterilization of liquids |
| What is claimed is: 1. In a centrifuge suitable for purification of a liquid comprising a ... |
|
| Method of and apparatus for selectively controlling a plurality of remotely located loads |
| I claim: 1. A system for operating a plurality of variously remotely located loads from a single ... |
|
| Pneumatic temperature reset differential pressure controller |
| OF THE PREFERRED EMBODIMENTS A variable air volume control system constructed in accordance with ... |
|
| Television system for displaying and recording paths of motion |
| The primary object of the present invention is to improve the viewability of a television display ... |
|
|
Methods and systems for performing short integer chen IDCT algorithm with fused multiply/add
| Details |
Inventors: Wang, Naxin;
Assignee: Sony Corporation (Tokyo, JP); Sony Electronics, Inc. (Park Ridge, NJ)
Primary Examiner: Mai; Tan V.
Assistant Examiner:
Attorney, Agent or Firm: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
Methods and apparatus for performing a fast two-dimensional inverse discrete cosine transform (IDCT) in a media processor are disclosed. A processor receives discrete cosine transform data and combines, in a first stage, the discrete cosine transform data with a first set of constants. In a media processor with a partitioned SIMD architecture, the discrete cosine transform data and first set of constants may be combined, for example, by multiplying the at least one input component with a first set of constants using a complex multiplication instruction. The output is transposed in a second stage and combined with constants in a third stage to obtain the pixel information of an image. |
|
DETAILED DESCRIPTION Methods for performing a two-dimensional inverse discrete cosine transform consistent with this invention comprise stages performed by a processor.
A processor receives at least one input component representing discrete cosine transform data and combines, in a first stage, the at least one input component with a first set of constants.
The input data and first set of constants may be combined, for example, by multiplying the at least one input component with a first set of constants using a complex multiplication instruction.
The output is transposed in a second stage and combined with constants in a third stage.
Furthermore, an IDCT apparatus consistent with the present invention comprises an input means, a memory, at least one circuit, and an output means.
The input means receives at least one input component representing discrete cosine transform data.
The memory stores a first and second set of constants.
The at least one circuit combines the input components with the constants in a first stage, transposes the output data, and combines the transposed first-stage output data with the second set of constants in a third stage.
The circuit means may comprise, for example, a means for multiplying the at least one input component with a first set of constants using a complex multiplication instruction.
The output means for outputting output components representing pixel information of an image.
|
| Related patents |
|
|
Method and apparatus for selecting image data to skip when encoding digital video
A block and frame skipping technique decides which image regions, blocks or frames in a video frame or series of frames should be skipped. Many of the blocks in a given ...
|
|
|
Method of producing an X-ray image by means of a photoconductor, and device for performing the method
We claim: 1. A method of producing an X-ray image by means of a photoconductor comprising a plurality of pixels, which converts X-rays into a charge pattern at each ...
|
|
|
Loudspeaker having a two-part diaphragm for use as a car loudspeaker
In order to obtain a frequency response characteristic with a broadened dip, the loudspeaker in accordance with the invention should be characterized in that the first ...
|
|
|
Horizontal synchronizing system
In accordance with an embodiment of the present invention, a phase control circuit for the horizontal frequency synchronizing pulse generator in a television camera ...
|
|
|
Multiple scanning type television receiver
The above problem is overcome by the present invention which is intended for use in combination with a horizontal deflection circuit of a multiple scanning type ...
|
|
|
Selective efficiency videofrequency non-linearity correction device
The invention provides a selective efficiency video frequency nonlinearity correction device, for the precorrection of nonlinearity introduced into the video frequency ...
|
|
|
Compression of data on status of remote equipment
The environment of this invention is a communication system in which each of a number of ground stations connected by a remote relay, in general satellite-borne, has a ...
|
|
|
Digital-analog converter
In accordance with the present invention, there is provided a novel digital-analog converter wherein a digital signal from an analog-digital converter is compared with a ...
|
|
|
Digital equalizer for data-transmission system
We claim: 1. An equalizer for digital messages insertable between a transmission channel and a load, comprising: a data lead for incoming pulses; a cascade of several ...
|
|
|
A/D and D/A converter using C-2C ladder network
It is therefore an object of the present invention to provide A/D and D/A converters employing a capacitor ladder network which may be manufactured using monolithic, ...
|
|
|
Image Analysis 
