Browse Prior Art Database

High Frequency Data Rate Transformer

IP.com Disclosure Number: IPCOM000061511D
Original Publication Date: 1986-Aug-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 81K

Publishing Venue

IBM

Related People

Casparian, MA: AUTHOR [+2]

Abstract

A method has been proposed to transform horizontal scan data of an image to vertical blocks of the image at a compatible data rate. The proposal is faster than software matrix manipulation used in semiconductor applications. While video data is received from a scanned image in a horizontal line orientation, a 16-bit vertical orientation is required for processing. The horizontal row data must be converted into vertical column data. A buffering system must also be used since the image scan data rate is faster than the analysis data rate. Raster scanning produces one high speed raster scan at a time (150 MHz). Fig. 1 shows the image area 1 with 16,384 pixels 2 and 16384 scans 3. However, the image processing hardware may require processing of multiple scan rows at the same time and at a much slower data advance rate.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 63% of the total text.

Page 1 of 2

High Frequency Data Rate Transformer

A method has been proposed to transform horizontal scan data of an image to vertical blocks of the image at a compatible data rate. The proposal is faster than software matrix manipulation used in semiconductor applications. While video data is received from a scanned image in a horizontal line orientation, a 16-bit vertical orientation is required for processing. The horizontal row data must be converted into vertical column data. A buffering system must also be used since the image scan data rate is faster than the analysis data rate. Raster scanning produces one high speed raster scan at a time (150 MHz). Fig. 1 shows the image area 1 with 16,384 pixels 2 and 16384 scans 3. However, the image processing hardware may require processing of multiple scan rows at the same time and at a much slower data advance rate. This is the case with the system shown in Fig. 2. This digitizes the analog image at a rate of 15 ns per pixel with the image analysis circuitry requiring 16 rasters 4 of image advancing at 240 ns. A data rate transformer Fig. 3 is required to transform a 1 bit, 15 ns data movement to a 16-bit, 240 ns data movement. There are two buffers 5,6 which are 16 bits deep and 16384 bits long. The top buffer 5 is being unloaded one 16- bit vertical word 7 at a time while the bottom buffer 6 is being filled with one 16-bit horizontal word 8 at a time from the optical scanning subsystem. The main aspect of the transformer is t...