COMPANDING CIRCUIT

• Main Author: HARADA SHIGERU
• Format: Patent
• Language: English
• Published: 16.06.2000
• Edition: 7
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION; PULSE TECHNIQUE

PROBLEM TO BE SOLVED: To optionally move a contour (edge) of a video signal and to delay it in the unit of several n-sec by dynamically varying a delay in the video signal at a high speed. SOLUTION: Latches 121-12n of n-stage are connected in series with an input terminal 11. Respective outputs from the latches 121-12n are fed to a selector 15. The selector 15 selects any of the outputs of the latches 121-12n based on a control signal CTLa. A sampling clock CK is fed to a delay circuit 14. The delay circuit 14 delays a clock CK by a time being fine divisions of on clock period T. A selector 17 using a control signal CTLb to select a clock fed to a D/A converter 18. The D/A converter 18 receives a digital luminance signal selected by the selector 15 via a latch 16. An analog luminance signal is extracted at an output terminal 19 of the D/A converter 18.