Glossary
Dolby Digital
This is a digital audio compression format that was developed by Dolby Laboratories. Dolby Digital encoding method (so- called discrete 5.1 channel digital audio format) records and compresses the left front channel, right front channel, center channel, left rear channel, right rear channel, and LFE channel (total 6 channels, but LFE channel is counted as 0.1 channel, therefore called 5.1 channels) signals digitally. Each channel is completely independent from other channel signals to avoid interference, therefore, you can obtain much better sound quality with stereo and surround effects.
To reproduce these original surround signals, you need to connect an amplifier or a decoder compatible with Dolby Digital.
DTS Digital Surround
Another discrete 5.1 channel digital audio format, available on CD, LD, and DVD software, developed by Digital Theater Systems, Inc.
Compared to Dolby Digital, audio compression rate is relatively low. This fact allows DTS Digital Surround format to add breadth and depth to the reproduced sounds. As a result, DTS Digital Surround features natural, solid and clear sound.
To reproduce these surround signals, you need to connect an amplifier or a decoder compatible with DTS Digital Surround.
Linear PCM
This is a digital recording format that is used for audio CDs.
Playback Control (PBC)
When a VCD has the PBC (Playback Control) function, you can enjoy
Sampling Frequency, Quantization Bits
When analog signals are converted into digital signals, they are divided into many points and digitized. This dividing method is called “sampling.” The sampling frequency indicates how many points one second is divided into – for example, for CD sound, one second is divided into 44100 points since its sampling frequency is 44.1 kHz. On the other hand, the number of quantization bits indicates the volume size used to memorize each divided point.
The larger this number is, the clearer the sound can be reproduced.
Output signal through the DIGITAL OUT (OPTICAL) terminal varies according to the “DIGITAL OUT (OPTICAL)” setting. See “Setting the DVD Preference (System)” on page 29.
| DIGITAL OUT | BITSTREAM | LPCM |
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Playback Disc |
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DVD | 48 kHz, Linear PCM | 48 kHz, Linear PCM | 48 kHz, Linear PCM |
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| 96 kHz, Linear PCM | 48 kHz, Linear PCM | 48 kHz, Linear PCM |
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| 128 kHz, Linear PCM | 48 kHz, Linear PCM | 48 kHz, Linear PCM |
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| Dolby Digital | Dolby Digital bitstream | Down mixed (2 channels) |
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| DTS Digital Surround | DTS bitstream | None |
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Video CD, Audio CD 44.1 kHz, 16 bit Linear PCM | 44.1 kHz, 16 bit Linear PCM | 44.1 kHz, 16 bit Linear PCM | |
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Audio DTS CD | DTS Digital Surround | DTS bitstream | None |
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