Video ADC

103_ext_03_en_0.jpg

THine Electronics, Inc. is producing video ADCs based on the advanced ADC technology. We are the pioneer of the high-speed video ADCs for high definition video in the flat panel display market. Our products achieve industry-leading performance of analog-to-digital conversion and feature intelligent sync signal processor to enable automatic configuration.

The THC7984 integrates all the functions to digitize analog video signals on a single chip. It is used in such as HDTVs and projectors to support analog component video from HD players and RGB graphics from PCs, etc. 

201310211640_1.png

Linearity is very important for the image quality of Video ADC.


If INL is big...Distortion and color unevenness occured at a gradation part of an image
201310162106_1.png
If DNL is big...Vertical noise occured at a gradation part of an image
201310162106_2.png

The THC7984 integrates all the functions to digitize analog video signals on a single chip.

  • The product introduced on this page is RoHS (2011/65/EU) compliant.

    Please contact THine's authorized distributors regarding documents for environmental regulations (MSDS, ICP report, Conflict Minerals, etc) and product spec documents (detailed information on package, packing, etc). Click here to find distributors.

    Click here for further question.

ADC introductions for beginner

1.What is ADC?

An ADC, also called AD Converteris a device for conversion of analog signal to digital signal.

201310162106_3.png

ADC converts inputted voltage values to outputs numerical values. 

(ex)  Inputted Voltage  numerical values.(Digital values)
      0V                 →  0 (0000)
      0.5V                →  7 (0111)
      1V                 →  15 (1111)
 

2.Analog signals and Digital signals

based on digital signal of AV devices

201310162116_1.png

3.Resolution of ADC specifications

The ADC is a ruler of voltage and resolutions is the scale on a ruler.

201310201704_1.png

The required resolution varies from applications or equipment.

Video Signals:8 to 12bits
 Audio Signals :16 to 24bits
 (ex.)Video Signals
201310201704_2.png

4.Conversion rate of ADC specifications

The digital signal is discrete for a direction at time. It need a sampling.

201310201704_3.png

 

The required rate of conversion varies from applications or equipment.
Video Signal:around 10MHz to 200MHz
Audio Signal : around 10kHz to 200kHz


(ex.)Video Signal
In case of 1080p-FHD 
An analog to digital converts pixel data(2200×1125=247.5Mpixel) of 1 screen while 1/60 sec.
The rate of conversion needed 148.5MHz.

201310201704_4.png
 
(according to the Nyquist–Shannon sampling theorem) 
It can be revitalize an original analog signal by sampling at frequency 2 times as analog input signal band. 
 

5.ADC Specifications for applications

The rate of resolution and conversion needed varies from usages.
201310201704_5.png

Optimized AD conversion method varies from rate of resolution and conversion
201310201704_6.png

6.Analog Video Signal types

Type of Signal Terminal Primary output devices
 Composite Video  RCA connector
  VCR, Video Game Console       
 Y/C signal  S-Video   VCR, Video Game Console     
 Component(YPbPr)  Component 
 D-terminal( D1~D5 ) 
  DVD Player, DVD Recorder
 PC signal(RGB)  PC connector(D-sub)   PCs, Workstation

201310162106_11.png


 




 




 

Product Name Number of Chanels Bit/Pixel Sampling Frequency Package Status
THC7984-17 3ch×2ports 30 10 to 170MSPS LQFP80 MP
212_ext_30_en_0.jpg
TV, Display, Monitor
224_ext_30_en_0.jpg
Cameras