SEGA SATURN DEVELOPER'S MANUAL

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MPEG / Audio function

Audio data played back with MPEG / Audio is sent to SCSP via the same route as CD-DA (music CD), and various effects can be applied.

● Variable compression rate

The compression rate can be selected according to the application, and compression from 1 / 3.5 to 1/21 can be selected. With 1/21 compression, you can record 50 hours of audio on a CD. All lines and narration can be performed by voice even with long RPG and ADV.

● On-memory playback function

MPEG / Audio can be compressed from 1 / 3.5 to 1/21, but for example, if half of the 4M bits of CD buffer memory is used for MPEG / Audio using 1/21 compression, You can play 64 seconds of audio without accessing the CD. Therefore, audio playback without waiting time is possible. You can also connect short lines to make long conversations.

● Supported standards

The supported standards for CD-ROM system are shown in Table 3.12.

Table 3.12 Compatible standards

Rule

Description

CD-DA

This is the name of the sound contained in the CD and is based on the RED BOOK international standard.
Sampling frequency 44.1KHz, quantization bit 16bit stereo.

CD-G, CD-EG

Data such as graphics is recorded in the format area of music CDs.
Adopts 16 colors and CD-DA sound quality.

CD-ROM

Record computer data in the same physical format as music CDs (CD-DA)
This is a standard established. Based on the YELLOW BOOK international standard.

CD-ROM XA

Interleave to expand CD-ROM and play back images and sounds in parallel A recording format that enables recording.

EB (electronic book)

CD-ROM software used by Sony's electronic book player "Data Disc Man"
Is the recording format.

Photo-CD

This system allows you to view photos through a monitor such as a TV.
Up to 100 photos can be recorded on a CD, and the same photo can be enlarged or reduced.

Video CD
(KARAOKE CD)

Records video compressed with MPEG. Up to 74 minutes can be recorded on a CD, and up to 2000 high-precision
still images can be played.

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Rule	Description
CD-DA	This is the name of the sound contained in the CD and is based on the RED BOOK international standard. Sampling frequency 44.1KHz, quantization bit 16bit stereo.
CD-G, CD-EG	Data such as graphics is recorded in the format area of music CDs. Adopts 16 colors and CD-DA sound quality.
CD-ROM	Record computer data in the same physical format as music CDs (CD-DA) This is a standard established. Based on the YELLOW BOOK international standard.
CD-ROM XA	Interleave to expand CD-ROM and play back images and sounds in parallel A recording format that enables recording.
EB (electronic book)	CD-ROM software used by Sony's electronic book player "Data Disc Man" Is the recording format.
Photo-CD	This system allows you to view photos through a monitor such as a TV. Up to 100 photos can be recorded on a CD, and the same photo can be enlarged or reduced.
Video CD (KARAOKE CD)	Records video compressed with MPEG. Up to 74 minutes can be recorded on a CD, and up to 2000 high-precision still images can be played.