Bong-Soon Kang

High performance integrated video decoder for multimedia video applications

This paper presents a high performance integrated video decoder which converts analog video signals to various video data, e.g., RGB, CCIR601, and square pixel video data, for more flexible multimedia video applications. Its performance has been proved after evaluation. A combing technique to reduce dot crawl noise caused by cross-luminance noise has been newly applied in the multimedia video interface area. Its effectiveness was proved by greatly reducing the noise effect on display monitors.

Design of a low power 7-bit serial counter with energy economized pass-transistor logic (EEPL)

Energy Economized Pass-transistor Logic (EEPL) is proposed. Adopting the principle of regenerative positive feedback with pMOS switches, we reduce the power in comparison with CPL and SRPL. To demonstrate the performance of EEPL, a low power 7-bit serial counter is designed. The operating speed is about 250 MHz with 0.6 /spl mu/m 3.3 V CMOS process.

Improved performance of video decoder using down scaler and adaptive comb filter

This paper presents the design of an integrated video decoder using image down scaler and adaptive comb filter. It accepts multistandard video signals from various video sources and produces digitized video data based on CCIR recommendations. The image down scaler reduces the size of the original image based on the scaling ratio. The adaptive comb filter removes dot crawl noise and hanging dot noise. Thereby, it provides improved performance of the decoder. The decoder was fabricated by using the 0.65 /spl mu/m CMOS process.

Robust single chip on screen display for home VCRs

This paper describes the design of a robust on-screen-display (OSD) chip with improved automatic frequency control (AFC). The built-in AFC reduces the amount of sync jitter caused by the VCR head switching pulse, video copy guard signals, etc. This chip contains the OSD circuitry which can display characters of up to 12 rows by 30 columns on display systems. The character colors can be changed by programming the content of an 8-bit control register through the serial interface. It also provides the functions of half tone, box drawing, scroll, and blink. The chip was fabricated by using a 0.65 /spl mu/m double metal CMOS process.

Design of a geometric-mean generator based on switched-current technique

A geometric-mean generator (A=/spl radic/(B/spl middot/C)) based on switched-current technique is proposed. A principle of superposition and cancellation is applied to the circuit. From the simulation results of the prototype circuit, it has an error within 5% in comparison with the mathematical calculation. The result shows the possibility of adapting the circuit to many types of analog processors.