msm9811 Oki Semiconductor, msm9811 Datasheet - Page 25
msm9811
Manufacturer Part Number
msm9811
Description
4-channel Mixing Oki Adpcm Type Voice Synthesis Lsi
Manufacturer
Oki Semiconductor
Datasheet
1.MSM9811.pdf
(44 pages)
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Playback Time and Memory Capacity
The playback time is determined by external memory capacity, sampling frequency, and voice synthesis algorithm.
The relationship is described below.
When the sampling frequency is 16 kHz and the voice synthesis algorithm is 4-bit ADPCM and an 8-Mbit ROM is
used, the playback time is calculated as shown below.
In the above equation, the playback time when the phrase control table function is not used is shown.
OKI Semiconductor
Playback time =
Playback time =
1.024 × (Memory capacity – 16) (Kbits)
Sampling frequency (kHz) × bit length
1.024 × (8192 – 16) (Kbits)
(The bit length is 4 bits for ADPCM and ADPCM2 and 8 bits for PCM.)
16 (kHz ) × 4 (bit)
≅ 131 (Seconds)
(Seconds)
FEDL9811FULL-04
MSM9811
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