Digital voice stereo decoder supports NICAM/A2/EIA-J standards

Tokyo, Japan—Asahi Kasei EMD Corp. (AKEMD) launched the AK4141, a single-chip, alignment-free digital decoder for European, Chinese and Japanese markets using NICAM/A2/EIA-J standards.

The AK4141 is AKEMD's latest addition to its Audio4home product line. Applications include digital video recorders, digital set-top boxes, and digital TVs with analog tuners.

The AK4141's all-digital implementation eliminates many components needed in existing analog NIMCAM/A2/EIA-J decoders. The AK4141 performs without external component alignment, eliminating adjustments during pre-shipment testing.

The AK4141 integrates NICMA/A2/EIA-J detection, as well as stereo, monaural and second voice detection function from the SIF signal from the tuner. It automatically selects the best signal, which can be output as digital PCM data, including auto level control (ALC), soft mute, a digital volume control, and stereo emphasis processing.

A sample rate converter performs direct connect processing of the asynchronous audio data from HDMI signals and the digital tuner. A digital interface transmitter (DIT) drives optical outputs, simplifying the internal digital audio design.

The AK4141 is available in a 48-pin LQFP. Evaluation boards and samples are available now.

Datasheet: click here.

Asahi Kasei EMD Corp.,

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