IT-Review

µPD9993 Melody Chip Supports MP3 and AAC Playback

Three single-chip melody LSI solutions from NEC Electronics offer superior sound technology for mobile phones. The product line-up consists of µPD9993, µPD9996 and the µPD9995 chip, a smallest-in-class monaural chip first introduced in September 2003.

Features of the µPD9993 Chip for MP3 and AAC Playback
The µPD9993 chip incorporates a digital signal processor (DSP) core for MP3 and AAC decoding, which enables playback of audio files in high-quality MP3 and AAC formats in addition to conventional musical instrument digital interface (MIDI) format. Incorporating a DSP core eliminates the need for an additional LSI chip to support these functions. The µPD9993 chip also employs leading surround sound from DiMAGIC’s Adaptive Surround Technology*, which processes two audio channels to produce five channels of stereo-wide surround sound. These features significantly enhance the sound quality in mobile phones, allowing users listening through headphones to enjoy music stored in their phones at CD quality, or to use songs instead of ring tones to indicate an incoming call.

Features of the µPD9996 Chip for Single-Speaker Mobile Phones
The µPD9996 chip provides specialized monaural (single-speaker) functions while eliminating high-end functions such as surround sound and external digital input/output (I/O) to offer an affordable sound synthesizer solution. The µPD9996 chip has a pin layout compatible with the NEC Electronics µPD9990/1/2 melody chips, which enables manufacturers to develop low-end mobile phones based on their existing µPD9990/1/2 designs.

Features of the µPD9995 Smallest-in-Class Monaural Chip
The µPD9995 offers monaural playback in a smallest-in-class package of 4.38 x 4.38 millimeters (mm). An optimized design configuration has reduced the pin count to 48, resulting in a 50 percent smaller package that enables greater flexibility in mobile phone design and reduces bill-of-materials costs for manufacturers.

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