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DVB-H is the latest development from the DVB Project targeting handheld, battery powered devices such as mobile telephones, PDAs, etc.. Based on DVB-T's excellent mobile performance, it answers need to ensure reliable, high speed, high data rate reception.

CMMB Multiplexer CMMB 6000

Product Highlights

CMMB Multiplex Frame generation compliant to the Mobile Multimedia Broadcasting specifications
One or two frequencies, user configurable
Up to 80 services
IPv4 and IPv6 support
Control Information Table generation: NIT, CMCT, CSCT, SMCT, SSCT, ESG Basic Description Table and Urgent Broadcast Table
Bandwidth: 8 MHz
Three modes of interleaving
LDPC Code Rate: ½ and ¾
Internal GPS
Hot Swapping between Main and Backup Unit

Standards Compliance

Mobile Multimedia Broadcasting Part 1:
Framing Structure, Channel Coding and Modulation for Broadcasting Channel, CMMB
Mobile Multimedia Broadcasting Part 2:
Multiplexing, CMMB Technical Working Group
H.264 Final Draft, ISO/IEC 14496-10 AVC
Internet Protocol, RFC 0760
Internet Protocol, Version 6 (IPv6), RFC 2460
User Datagram Protocol, IEN-88
RTP: A Transport Protocol for Real-Time Applications, RFC 3550
SDP Session Description Protocol, RFC 2327
RTP Payload Format for H.264 Video, RFC 3984
RTP Payload Format forAC-3 Audio, RFC 4184
RTP Profile for Audio and Video Conferences with Minimal Control, RFC 1890
ISO/IEC 13818-1

Product Description

Multiplexing is used for encapsulation of multiple Audio, Video, and Data services and Control information in Multiplex Frames (MMB Part 1, 2). The main functions of the multiplexer are to receive the incoming data, prepare control and service information tables, encapsulate the data in frames depending on the data type and classification criteria, schedule time slots maintaining appropriate FIFO levels, and distribute the service and control tables multiplex in MPEG-2 TS packets to the modulators through ASI interfaces. The multiplexer can be used in two possible cases. At the head end as a central multiplexer of global services, multiplexing simultaneously one or two networks (1), and locally as a multiplexer of local content (2). The multiplexer is designed to satisfy the requirements in both modes and operate in any one of them with minimal configuration.