beautypg.com

Introduction, 9305 functional description, Thru – Cobalt Digital COMPASS 9305 Embedded Audio Delay Processor User Manual

Page 13

background image

9305-OM (V4.1)

9305 PRODUCT MANUAL

1-9

Introduction

9305 Functional Description

If a signal level below a selected threshold on all four of the selected
channels designated as

C

,

LFE

,

Ls

, and

Rs

is present, this indicates

that these channels are not carrying 5.1. In this case, the upmixer
overwrites all six selected channels with the new 5.1 content.

If a signal level above a selected threshold on any of the four selected
channels designated as

C

,

LFE

,

Ls

, and

Rs

, this indicates that the

channel(s) are already carrying viable 5.1 content. In this case,
upmixing is bypassed, allowing the original channels to pass
unaffected.

The examples in Figure 1-4 show the automatic enable/disable up-mixing
function applied to example selected channels

Emb Ch 1

thru

Emb Ch 6

. As

shown and described, the processing is contingent upon the signal levels of
the channels selected to carry the new 5.1 upmix relative to the selected
threshold (in this example, -60 dBFS). Note also that this function is applied
after the Audio Delay and Audio Routing/Gain Control functions.

Figure 1-3 Up Mix Auto Enable/Bypass with Example Sources

Emb Ch 1 – Ch 16

>

From Audio Routing/Gain Control

Emb Ch 1

Emb Ch 2

Emb Ch 3

Emb Ch 4

Emb Ch 5

Emb Ch 6

L

R

(C)

(LFE)

(Ls)

(Rs)

L – Emb Ch 1

R – Emb Ch 2

C – Emb Ch 3

LFE – Emb Ch 4

Ls – Emb Ch 5

Rs – Emb Ch 6

To Audio Embed

With all detected signal levels on
Emb Ch 3 – Ch 6 below
threshold, upmixer is active and
overwrites with new 5.1.

Threshold

Detect

5.1 Up Mix

Selected channels Emb Ch 1 – Ch 6
are overwritten with the new 5.1
upmix content.

Emb Ch 1 – Ch 16

>

From Audio Routing/Gain Control

Emb Ch 1

Emb Ch 2

Emb Ch 3

Emb Ch 4

Emb Ch 5

Emb Ch 6

L

R

(C)

(LFE)

(Ls)

(Rs)

To Audio

Embed

Threshold

Detect

5.1 Up Mix

Because the selected channels are
already carrying viable content,
upmixing is bypassed, allowing the
six original Emb Ch 1 – Ch 6 to pass
unaffected.

With any detected signal levels
on Emb Ch 3 – Ch 6 above
threshold, upmixer is bypassed.

X

X

X

Note: In either case shown here,

the unselected channels
(in this example, Emb Ch
7 thru Ch 16) are not
involved in this process
and always pass
unaffected.

- 20 dBFS

- 60 dBFS

Above Threshold

(Bypass)

C

LF

E Ls Rs

- 20 dBFS

- 60 dBFS

Below Threshold

(Overwrite)

C

LF

E Ls Rs