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Additional Information
Additional information
wDolby Pro Logic II
• Dolby Pro Logic II is a new |
developed by Dolby Laboratories using feedback logic steering |
technology and offering improvements over conventional Dolby |
Surround
[1] Dolby Surround
qDolby Digital
Dolby Digital is the
Dolby Digital consists of up to “5.1” channels – front left, front right, center, surround left, surround right, and an additional channel exclusively reserved for additional deep bass sound effects (the Low Frequency Effects – LFE channel, also called the “.1” channel, containing bass frequencies of up to 120 Hz).
Unlike the analog Dolby Pro Logic format, Dolby Digital’s main channels can all contain full range sound information, from the lowest bass, up to the highest frequencies – 22 kHz. The signals within each channel are distinct from the others, allowing pinpoint sound imaging, and Dolby Digital offers tremendous dynamic range from the most powerful sound effects to the quietest, softest sounds, free from noise and distortion.
2Dolby Digital and Dolby Pro Logic
2Dolby Digital compatible media and playback methods
Marks indicating Dolby Digital compatibility:
The following are general examples. Also refer to the player’s operating instructions.
Media | Dolby Digital output | Playback method | ||
terminals | (reference page) | |||
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| Coaxial Dolby Digital | Set the input mode to | ||
LD (VDP) | RF output terminal |
| “AUTO” | |
| 1 | ( | page 51). | |
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| Optical or coaxial | Set the input mode to | ||
| digital output | |||
DVD |
| “AUTO” | ||
(same as for PCM) |
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| ( | page 51). | ||
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Others | Optical or coaxial | Set the input mode to | ||
(satellite broadcasts, | digital output |
| “AUTO” | |
CATV, etc.) | (same as for PCM) | ( | page 51). | |
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Pro Logic circuits. |
• Dolby Pro Logic II can be used to decode not only sources |
recorded in Dolby Surround ( ) but also regular stereo sources |
into five channels (front left, front right, center, surround left |
and surround right) to achieve surround sound. |
• Whereas with conventional Dolby Pro Logic the surround |
channel playback frequency band was limited, Dolby Pro Logic |
II offers a wider band range (20 Hz to 20 kHz or greater). In |
addition, the surround channels were monaural (the surround |
left and right channels were the same) with previous Dolby Pro |
Logic, but Dolby Pro Logic II they are played as stereo signals. |
Sources recorded in Dolby Surround
• These are sources in which three or more channels of surround |
have been recorded as two channels of signals using Dolby |
Surround encoding technology. |
• Dolby Surround is used for the sound tracks of movies recorded |
on DVDs, LDs and Video cassettes to be played on stereo |
VCRs, as well as for the stereo broadcast signals of FM radio, |
TV, satellite broadcasts and cable TV. |
• Decoding these signals with Dolby Pro Logic II makes it |
possible to achieve |
signals can also be played on ordinary stereo equipment, in |
Comparison of home | Dolby Digital | Dolby Pro Logic | |
surround systems | |||
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No. recorded channels | 5.1 ch | 2 ch | |
(elements) | |||
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No. playback channels | 5.1 ch | 4 ch | |
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Playback channels | L, R, C, SL, SR, SW | L, R, C, S | |
(max.) | (SW – recommended) | ||
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| Digital discrete | Analog matrix | |
| processing Dolby | ||
Audio processing | processing Dolby | ||
Digital encoding / | |||
| Surround | ||
| decoding | ||
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High frequency |
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playback limit of | 20 kHz | 7 kHz | |
surround channel |
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1: Use a commercially available adapter to connect Dolby Digital RF output signals to the digital input terminals. (Refer to the adapter’s operating instructions.)
Please refer to the instruction manual of the adapter when making connection.
2: To play in Dolby Digital Surround on the
which case they provide normal stereo sound. | |
• There are two types of DVD Dolby surround recording signals. | |
q | |
w | |
2Sources recorded in Dolby Surround are indicated with the logo mark shown below
Dolby Surround support mark:
Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the
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