NDS3542A MPEG 2 MPEG 4 HDMI to ATSC-T Encoder Modulator

NDS3542A MPEG 2 MPEG 4 HDMI  to ATSC-T Encoder Modulator

NDS3542A series products are DEXIN’s new breakthrough all-in-one devices which integrate encoding ( MPEG-2 HD , MPEG-4/AVC H.264) and modulating to convert HDMI signals into ATSC RF output. It has equipped with 4 HD channels input and 1 ASI input and output with 2 ASI ports and 1 UDP IP port.

It adopts inner drawer-type structural design which greatly facilitates the change of encoding modules (HDMI/CVBS/SDI/YPbPr) as needed.

The signals source could be from satellite receivers, closed-circuit television cameras, Blue-ray players, and antenna etc. Its output signals are to be received by TVs, STB and etc with corresponding standard.

With its various inputs available, DeXin NDS3542A series products are wildly used in public places such as metro, market hall, theatre, hotels, resorts, and etc for advertising, monitoring, training and educating in company, schools, campuses, hospital… It’s a good choice to offer HD channels and more.

n MPEG2 HD/MPEG4 HD video encoding

n Up to 1920*1080@50P/60P supported (MPEG4 HD)

Up to 1920*1080@50I/60I supported (MPEG2 HD)

n 4* HDMI in, 1*ASI in

n Support Dolby Digital AC3(2.0) audio encoding

n Simultaneously encoding each channel more than 10Mbps

n 4* ATSC RF out (4 carriers combined output)

n Support IP (MPTS) output

n Excellent modulation quality MER≥42dB

n RF Frequency range 30Mhz~960Mhz

n LCD display, Remote control and firmware

n Web NMS management; Updates via web

n Lowest cost per channel --- breakthrough price

Principle chart

Encoding Section

Video

Encoding	MPEG2 HD/MPEG4 HD
Input	HDMI*4
Resolution	1920*1080_60P, 1920*1080_50P, (-for MPEG4/H.264) 1920*1080_60i, 1920*1080_50i, 1280*720_60p, 1280*720_50P 720*480_60i, 720*576_50i

Audio

encoding	MPEG1 Layer II, MPEG2-AAC, MPEG4-AAC, Dolby Digital AC3(2.0)
Sample rate	48KHz
Bit rate	64kbps, 96kbps,128kbps, 192kbps, 256kbps, 320kbps

ATSC Modulator Section

Standard	ATSC A/53
Constellation	8 VSB
RF Output Level	26~-10dbm (81~97dbµV), 0.1db step
MER	≥42dB
RF frequency	30~960MHz, 1KHz step

System

Local interface	LCD + control buttons
Remote management	Web NMS
output	2 ASI out (BNC type); 1 IP out (RJ45, 100M)
NMS interface	RJ45, 100M
Language	English

General

Power supply	AC 100V~240V
Dimensions	482*400*44mm
Weight	5 kgs
Operation temperature	0~45℃

Why do we need 4 x ATSC-T carrier output in one device?

Firstly, it is to guarantee the sound picture quality of HD programs.

As we all know, to guarantee the picture quality of 1920x1080@50I/60I resolution HD program, the video bit-rate may reach up to 11Mbps and even above. However, the maximum possible bit-rate output for single ATSC-T carrier is only around 19 Mbps.

11Mbps x4 =44Mbps > 19 x 2 Mbps.

It means the single or even dual ATSC-T carriers simply can't carry the 4 channels 1080i HD program if the average bit-rate exceeds 10 Mbps.

That's why we design 4*ATSC-T carrier modulation board which broaden the maximum possible bit-rate bandwidth up to 76Mbps (19*4), which rightly makes it reliably carry 4 channel HD programs output simultaneously.

Below brief chart will help to more clearly illustrate the working principle.

Secondly, it is cost-saving.

Its high integration allows users to transmit more programs with fewer devices. It undoubtedly saves the cost for you and me.

About Dexin Digital Technology CoRP. Ltd.