Digital Radio Update - June 3, 2009


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HD Radio Terminology

The New Language of Digital Radio
NPR: National Public Radio
NRSC: National Radio Systems Committee
NRSC-1: NRSC Standard: AM pre-emphasis/de-emphasis and transmission bandwidth specifications.
NRSC-2: NRSC Standard: AM emissions limit specifications
NRSC-3: NRSC Standard: AM receiver audio bandwidth and distortion recommendations.
NRSC-4: NRSC Standard: RBDS data subcarrier standard
NRSC-5: AM and FM IBOC transmission standard (note: NRSC standards revisions have a letter appended to the standard number, i.e., NRSC-5-A.)


Products

New Sanyo Tuner/Chipset Design Gain Ibiquity Certification
Ibiquity Digital has approved Sanyo Semiconductor Corporation's SDRS-400 reference design and its LC75040 tuner for use in digital HD Radio receivers. Although designed primarily for automotive products, Sanyo claims the design is well suited for other applications in HD Radio devices.

The SDRS-400 reference is comprised of a LV25400 RF front-end IC and LC75040 analog back-end IC. The combination provides digital AM/FM tuner, RDS and audio functionality with a microcomputer in a single DSP chipset that couples with HD Radio decoder ICs to provide a full receiver package for automotive applications.

The HD Radio approval process includes an inspection of performance and functionality to ensure compliance with the HD Radio broadcast system requirements. Ibiquity notes that the new certification places Sanyo Semiconductor alongside NXP in offering radio receiver manufacturers a front-end chipset suitable for ready integration with HD Radio decoders.




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