PIXEL NUMBER CONVERTING DEVICE

• Main Authors: MATOBA KAZUAKI, SUGANO MIKI
• Format: Patent
• Language: English
• Published: 23.10.1998
• Edition: 6
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CALCULATING; COMPUTING; COUNTING; CRYPTOGRAPHY; DISPLAY; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEALS

PROBLEM TO BE SOLVED: To make capacity of an input buffer memory small even when the number of pixels is increased by storing a pixel signal which is generated based on an output read out from a first memory and has different pixel numbers in a second memory and reading out it. SOLUTION: A period T (period 2) supplied to an output buffer memory 5 and a D/A converter 6 as a sample period of an output image signal is supplied also to an input buffer memory 3 and a pixel number conversion device 4. When the number of pixels is increased, the input buffer memory 3 stores an image signal synchronizing with the period T, and reads out an image signal synchronizing with the period T, while the pixel number conversion circuit 4 generates an image signal having different pixel numbers for output read out from the input buffer memory 3 synchronizing with the period T. Thus, capacity of the input buffer memory can be reduced by changing the same period inputted to the input buffer memory 3 depending on writing data in the input buffer memory 3 or reading out data from the memory 3.