ml2240 Oki Semiconductor, ml2240 Datasheet - Page 18

• Manufacturer Part Number: ml2240
• Description: 4-channel Mixing Oki Adpcm Algorithm-based Speech Synthesis Lsi
• Manufacturer: Oki Semiconductor

Playback Time and Memory Capacity
The playback time depends upon the memory capacity, sampling frequency, and playback method.
The equation showing the relationship is given below.
Playback time [sec] =
Example: Let the sampling frequency be 16 kHz and 4-bit ADPCM algorithm. If one 8 Mbits ROM is used, then
the playback time is obtained as follows:
Playback time =
The above equation gives the playback time when the phrase control table function is not used.
OKI Semiconductor
1.024 × (8192 – 16) (Kbit)
16 (kHz) × 4 (bit)
1.024 × (Memory capacity – 16) (Kbit)
Sampling frequency (kHz) × Bit length
(Bit length is ADPCM, ADPCM 2 = 4 bits; PCM = 8 bits.)
≅ 131 (sec)
FEDL2240DIGEST-02
ML2240 Family
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