RFDTMB vs. CMMB: Key Differences Explained
dtmb
cmmb
broadcasting
digital tv
mobile tv
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This article clarifies the differences between DTMB and CMMB, two multimedia broadcasting technologies prominent in the Republic of China.
Introduction
DTMB (Digital Terrestrial Multimedia Broadcast) and CMMB (China Multimedia Mobile Broadcasting) are both multimedia broadcasting technologies used in China. Let’s delve into what sets them apart.
DTMB serves as a digital TV standard suitable for both mobile and fixed devices. Conversely, CMMB is tailored for mobile TV and multimedia, developed specifically for mobile scenarios within China.
DTMB vs. CMMB: A Detailed Comparison
The following table highlights the key differences between DTMB and CMMB:
| Parameters | DTMB | CMMB |
|---|---|---|
| Full Name | Digital Terrestrial Multimedia Broadcast | China Multimedia Mobile Broadcasting |
| Modulation | OFDM (1.5 MHz) | OFDM (2/8 MHz) |
| Resolution | Up to high definition (1080i) | Low definition (320p) |
| Usage/Application | Terrestrial and Mobile television | Mobile television |
| Frequency Band | UHF and VHF Bands in MHz range | 2.6 GHz |
| Channels | SD channels (6 to 15), HD channels (1 or 2) | 25 video channels, 30 audio channels |
| HDTV Broadcast | Supported | Not supported as CMMB uses QCIF or QVGA |
| Typical Usage Scenario | Large screen devices in fixed scenarios | Small screen devices in mobile scenarios |
