Overview

The LA7386 combines luminance signal processing functions and color signal processing functions for NTSC VCRs on a single chip. Developed as a new-generation LSI for use in VCRs which offer increasingly higher image quality, the LA7383 offers all of the functions needed in order to realize improved picture quality in a dramatically compact 36-pin package, making this device suitable for a wide range of VCRs, from popularly priced models to high-end models.

特性 Features

? Includes all functions required for video signal processing in an NTSC VCR.

? Supports full HQ functions.

YNR on chip (standard).

CNR on chip (external components can be removed for passthrough operation).

Detail enhancer on chip.

Higher white clipping level (190).

? In addition to the above, also provides the following functions for excellent image quality: Edge compensation.

Double high-pass noise canceller → permits wide-band noise reduction.

Linear phase-type image quality adjustment → ideal image quality adjustment method, with no waveform distortion.

? By adopting the 1CCD method, one comb filter (glass) has become unnecessary.

Has a single 1H-delay CCD and a comb Y/C separation/YNR chroma crosstalk canceller function on chip.

? Automatic adjustment filter on chip.

Y: LPF

C: 3.58 MHz BPF, 4.21 MHz BPF, LPF (REC)

? No adjustment required for white and dark clipping levels.

? Extremely few peripheral components (about 60 components, excluding peripheral components for the CCD).

? fsc output can be used as clock for OSD IC.

Crystal oscillator for the on-screen display circuit is not required.

? DCC circuit on chip.

Suppresses flicker at top of screen and reduces AM noise.

? High-speed AFC circuit.

Prevents color alteration and loss at top of screen when dubbing.

? Head switching noise reduction circuit on chip.

? Smallest package in the industry.

? Few components needed.