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  • NEC’s New Melody Chip

    NEC Electronics announced the PD9971 melody chip [.jpg image ] for mobile phones, which offers a 3-D positioning function with built-in real-time processing, stereo 16-bit DA converter and 128 polyphonic tones. The combination of features will help OEMs deliver dynamic sound quality with on-chip functions including pitch bend, vibrato, delay, reverb, chorus, compression and Doppler. The chip is also compatible with Mobile XMF and Standard MIDI Files (SMF).

    Product information - PD9971

  • Real-time timbre is reproduced with PCM sound source system.
  • Maximum of 128 sounds being simultaneously pronunciation possibility, it draws up & reproduces richer music.
  • 3D positioning サラウンド function of rial-time processing is built in.
  • MOBILE-XMF is supported.
  • As one for イコライジング of the speaker, the digital parametric equalizer is built in.
  • Because the MIDI port of 4 ports is loaded inside the sound source core, it is possible to play back 4 tunes simultaneously.
  • The advanced stereo 16 bit DA converter for audio is built in.
  • Audio DAC sampling frequency (fs) it corresponds to 5 types of 8kHz/16kHz/32kHz/44.1kHz/48kHz.
  • Audio serial input/output interface (16 bits) it has equipped.
    Input frequency of the serial data is variable possible to 32fs - 64fs. (At the time of slave mode)
    The format corresponds to right stuffing left stuffing IIS.
  • Serial input/output interface outside the sound source is equipped.
  • Stereo line output for audio is equipped.
  • 8 bits parallel interface and serial interface are equipped as a CPU interface.
  • Control output function of vibration and LED is built in.
  • Because the one for internal master clock formation PLL is built in, it is correspondence possible in the various input clocks.
  • Digital power source (DVDD) the business regulator is built in.
  • Power supply voltage I/O power source (EVDD): 1.7 - 3.3V and the power source for PLL (PLLVDD): 2.7 - 3.3V and analog power source (AVDD): 2.7 - 3.3V and regulator power source (REGVDD): 2.7 - 3.3V
  • Operational ambient temperature: - 20 - + 85 ℃ 
    • Posted: 30 March 2005 | Filed: Terminal Technology, Wireless News | Feedback | Print |
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