عملکرد نمایش OSD در گیرنده COFDM

Key1: turn on/off the status of the OSD displaying, برای تعویض طولانی مدت آن را فشار دهید(بیش از 1 ثانیه). the status will be kept after reboot. هنگامی که وضعیت OSD بدون ورودی داده OSD از دیتا روشن است, دستگاه اطلاعات را روی صفحه ویدیو به عنوان نمایش می دهد:

RF：338.0مگاهرتز BW：4.0مگاهرتز; RF, فرکانس کاری; BW, پهنای باند

QPSK CR：2/3  سرباز:1/16; صورت فلکی, FEC, فاصله گارد.

AIR：3.90مگابیت در ثانیه; AIR, نرخ بیت انتقال بی سیم

VBR：3.05مگابیت در ثانیه AES OFF; VBR, نرخ بیت ویدیو; AES OFF, رمزگذاری AES خاموش شد.

SIG1：27   SIG2：22; SIG1, signal intensity of ant 1; SIG2, signal intensity of ant 2   

ber1:0.14%  ber2:100.00%; ber1, bit error rate of ant 1; ber2, bit error rate of ant 2

ضبط کردن بدون ذخیره سازی; وضعیت ضبط ویدیو

What is VBR? VBR is the video encoding bit rate at the transmitter. Since the video picture changes dynamically, VBR is of course variable, but it fluctuates around the encoding bit rate set by the transmission system: 7.81*0.8=6.248Mbps

How to use OSD API in Our COFDM systems?

Steps description:

1) The customer’s module sends the digital data to our COFDM transmitter via UART;

2) Our transmitter will send the digital data with video data together to our COFDM receiver via the wireless link;

3) Our receiver will send out the digital data to the customer’s module via UART;

4) The customer’s module should transfer the digital data into the characters string they want to show on the video screen in OSD mode. Then the customer’s module sends the characters string to our receiver via the same UART.

5) Our receiver will display the character’s string on the HDMI display screen with the video together in OSD mode.

API of Our COFDM receiver:

فرمان	ATOSD$(font), $(ایکس),$(و),$(خ) _مثال：ATOSD1,40,20,height: 100m_
مولفه های	font:  0:  8×16, پیکسل;  1:  16×24, پیکسل; ایکس:   0 به 1919, horizontal axis; و: 0 به 1079, vertical axis; Str:   characters string start to show on the HDMI screen from (ایکس,و) point; space characters used for a clean screen at that point. Since ’_’ is the command end flag, No ’_’ can be used in these parameters.
عملکرد	To display the characters string on the HDMI screen with the video in OSD mode
return	Null
شرح	1) This command is used for the customer’s MCU module to our Receiver via data UART; 2) You can use ATST فرمان(described in other documents) to define our Receiver UART;  3) You should draw the HDMI screen following 1920*1080 pixels via (ایکس,و) axis. Our receiver firmware will adjust it automatically according to the real screen systems.