UID1442895
威望0
金钱751
交易诚信度0
主题0
帖子548
注册时间2018-8-9
最后登录2019-12-27
初级会员
交易诚信度0
注册时间2018-8-9
|
好吧,看来跟你交流还得先从扫盲电视原理开始。
先贴一下你发的英文,我说你是只懂英文,不懂电视原理,看来你不服,仔细看看下面的英文写的是什么,告诉你那英文写的是最基本的彩色电视机视频信号处理流程,我先来给你扫盲(你也可以去买本电视机原理教科书自学)。
一台彩电,哪怕是世界上最老的CRT彩电,都是遵从这个流程的:
1. 高频头接收射频(RF)信号,再通过差频处理转为中频(IF)信号
2. 中频信号通过同步检波转换成复合视频(Composite)信号
3. 复合视频信号通过梳状滤波转换成亮/色(Y/C)分离信号
4. 亮/色分离信号再转换成RGB来驱动显示
你这大段的英文所描述的就是我上面说的步骤,不重要的事情我也说三遍,这是视频处理!视频处理!视频处理!哪怕是台晶体管CRT彩电也是这么做的!
不是画质处理!
我很吃惊,原来你家的设计师以为这就是画质,难不成还停留在采用公版方案,简单组装的层次?
一台入门廉价液晶电视机,大可以采用这种公版廉价方案,一块MT芯片简单的前后端处理全有,接上个显示屏就能出画,这就是你心目中的天经地义吧?
而高端电视机,最多只会用到MT芯片的前端处理,后端处理是由另外的PQ Processor芯片来完成的!
另外,你去搜再多的芯片照片也没用,我只跟你说一句,世界上没有一家公司会无聊到拿逻辑电路(T-con)上的芯片来冒充自己的画质处理IC的,因为一个入门半年的底层设计师就能一眼看穿。
----------------------------------------------------------------------------------------------------------
Video/Audio Signal Process - 5
The main function of the A board is to select and process one of the incoming video signals.
IC8601 ( or IC8705) is just switches of USB signals. The built in WiFi module is connected by
USB type of terminal.
Video input, Component Video Input, HDMI input and the composite video output of the tuner
are all connected to IC8000 for selection. The video input signal can be two formats: Video, or Y,
Pb, Pr. A comb filter inside IC8000 converts the composite video signal of the main picture to Y
and C (luminance and chrominance) signals. The signal is then converted to RGB. At the
completion of this process, the format of the composite signal is now the same as a digital 1080i
component signal. If the incoming video is in the 480p, 720p, 1080i, and 1080p format, the Y, Pb,
and Pr signals undergo A/D (analog to digital) conversion. Finally all picture signals are
converted to 1080p.
Digital television reception of the tuner is output in the form of an IF (Intermediate Frequency)
signal. The transport stream from the tuner enters the VSB I/F (Interface) section of IC8000 where
the video signal is extracted and converted to YUV data. The output is provided to the Video Input
I/F for selection. The JPEG data of the SD card enters the JPEG I/F section of IC8000 for
conversion into YUV data and output to the Video Input I/F circuit. The video input interface
outputs the selected picture data to the video process circuit.
This Video Process section of the IC performs all picture control operations such as brightness,
contrast, color, tint, etc. On Screen Display data such as channel numbers, Digital TV closed
caption, and picture adjustments are mixed with the video data. If in 3D mode, it converts to the
right and left pictures. After the process, LVDS (Low Voltage Differential Signaling) is output to
LCD panel module. # IC9000 is the frame rate converting IC for high speed LCD panel. IC4300
adjust the brightness for HDR feature.
|
|