3-Layer ISDB-T Modulator (ISDBT-M)

The Zaltys Terrestrial Integrated Services Digital Broadcasting Modulator (ISDBT-M) IP core is a 3-layer ISDB-T hierarchical modulator compatible with the ARIB STD-B31 standard. The core can process either a single BTS transport stream (containing information for all three layers of the ISDB-T frame structure), a single MPEG transport stream (with user assigned mapping of PID’s to layers), or three independent MPEG transport streams, one for each layer. It performs all the necessary processing required to output a complex modulated baseband signal to a pair of external DACs.

Functional blocks include:

  • Fully Compliant Broadcast Transport Stream (BTS) Interface
  • Individual Layer Interfaces with FIFOs
  • Reed-Solomon & Convolutional Encoding
  • Differential & Coherent Modulation
  • Time & Frequency Interleaving
  • 2K, 4K or 8K IFFT Processing
  • Guard Interval Insertion

Zaltys Logo

Show the block diagram (opens in new window)
Show more details & prices | Hide details

Technical Features
Fully SFN compliant 13-segment ISDB-T modulator
Compliant with the ARIB STD-B31 standard
Supports 1, 2 or 3 (hierarchical) layers
BTS interface for Studio Transmitter Link (STL)
Supports 2K, 4K & 8K FFT sizes (modes 1, 2 & 3)
DQPSK, QPSK, 16QAM & 64QAM modulation schemes
1, 2, 4, 8, 16 & 32 time-interleaver depths
1/2, 2/3, 3/4, 5/6 & 7/8 code rates
1/4, 1/8, 1/16 & 1/32 guard intervals
Auxiliary channel (AC) port
Microprocessor controllable
Single DDR2 SDRAM interface
Time windowing reduces effects of OFDM symbol discontinuities
Test-mode traffic generator
Transmission bandwidth depends on system clock - 6/7/8MHz all supported
Flexible input stream configuration - BTS or TS
Fully synchronous design
Suitable for Xilinx FPGA
Hardware evaluation board (available extra)