Panasonic KX-VC300CX / KX-VC600CX Service Manual ▷ View online
17
KX-VC300CX/KX-VC600CX
4.2.12. Audio
4.2.12.1. Outline
HD Visual Communication System (HD-COM) is connected between sites via internet.
After A/D conversion, HD-COM encodes audio from microphone and sends it to the receiver site.
It also decrypts the encoded audio signal received from other sites and outputs the converted audio signal to speakers.
Encoded audio signal received from network is decoded at processor and is outputted to the speaker via transceiver after D/A con-
version.
Input audio, such as from microphone, goes to the processor to be encoded and is sent to network after it is after A/D conversion.
After A/D conversion, HD-COM encodes audio from microphone and sends it to the receiver site.
It also decrypts the encoded audio signal received from other sites and outputs the converted audio signal to speakers.
Encoded audio signal received from network is decoded at processor and is outputted to the speaker via transceiver after D/A con-
version.
Input audio, such as from microphone, goes to the processor to be encoded and is sent to network after it is after A/D conversion.
Specification of video interface of HD-Com is as follows.
Classification
Name
Type
input
MIC(Analog)
Mini DIN
Audio_IN
Pin jack
HS_MIC
Stereo mini jack (3.5[mm])
MIC(Digital)
exclusive connector
output
HS_SP
Stereo mini jack (3.5[mm])
Audio_OUT
Pin jack
AV OUT MONITOR
HDMI #3
18
KX-VC300CX/KX-VC600CX
1. Function explanation of audio
Block diagram of function audio of KX-VC600.
Block diagram of function audio of KX-VC300.
HS_MIC
CN302
IC301
IC1600
CN701
OUT
MONITOR
HDMI #3
RCA OUT
IC701
HDMI transceiver
DAC
IC22
Memory Controller
AV Codecl
AVIO
Local memory
Local memory
(DDR2 SDRAM)
Local memory
Local memory
(DDR2 SDRAM)
Network front end
(IP packetization)
100Mbps
LAN
controller
CN1001
RJ45
IC1901, IC1902
IC2001, IC2002
IC1002
IC121
Field Programmable
Logic Devices
Logic Devices
DSP Main)
FPGA devide
(3) TRANSCEIVER PART
(1) RECEIVER PART
(2) PROCESSOR PART
MIC (Digital)
IC19
IC1
IC1401
CN9
HS_SP
CN301
Peripheralr
RCA IN
CN7
IC201
ADC
ADC
RX
TX
SW
MIC(Analog)
HS_MIC
CN302
IC301
IC1600
CN701
VIDEO OUT
MONITOR
HDMI #3
Audio OUT
IC701
HDMI transceiver
DAC
IC22
Memory Controller
AV Codec
AVIO
Local memory
Local memory
(DDR2 SDRAM)
Local memory
Local memory
(DDR2 SDRAM)
Network front end
(IP packetization)
100Mbps
LAN
controller
CN1001
RJ45
IC1901, IC1902
IC2001, IC2002
IC1002
Field Programmable
Logic Devices
Logic Devices
DSP (Main)
FPGA device
(3) TRANSCEIVER PART
(1) RECEIVER PART
(2) PROCESSOR PART
MIC
IC19 (Sub-A)
(Sub-A)
IC1
IC1401
CN9
HS_SP
CN301
Peripheral
CN6
Audio IN
CN7
DSP (Sub)
IC201
ADC
ADC
RX
TX
SW
(Sub-A)
(Sub-C)
(Sub-A)
(Sub-A)
(Sub-C)
(Sub-A)
VC600 Only
19
KX-VC300CX/KX-VC600CX
Audio is broadly-divided into receiver, process, and transceiver.
1. Audio receiver
1. Audio receiver
The number of import port of receiver part differs for VC300 and VC600 as indicated in the diagram. For VC600, 4 types are pro-
vided: digital microphone input, analog microphone input, headset audio input, Audio pin jack audio input. For VC300, 3 types
are provided: analog microphone input, headset audio input, Audio pin jack audio input.
vided: digital microphone input, analog microphone input, headset audio input, Audio pin jack audio input. For VC300, 3 types
are provided: analog microphone input, headset audio input, Audio pin jack audio input.
2. Audio processor
The processor (IC1600) called as PEAKS-PRO2 is the core processor. It decodes encoded audio signal received from network
and sends it to transceiver. It also encodes input audio and sends to network.
The processor has a clock generation circuit necessary for the system.
and sends it to transceiver. It also encodes input audio and sends to network.
The processor has a clock generation circuit necessary for the system.
3. Audio transceiver
For output port, both VC300 and VC600 have 3 types: HS_SP, Audio_OUT, VIDEO_OUT(HDMI#3).
4. Exclusive control
1. Audio input
2. Audio output
5. Simple explanation of Block diagram
• MIC(Digital)
Connector to connect digital microphone (KX-VCA001)
• MIC(Analog)
Mini DIN type connector to connect analog microphone (KX-VCA002)
• HS_MIC
Stereo mini jack connector: to connect headset microphone.
• Audio_IN
Analog audio input connector of Audio pin jack pin 2.
• Audio_OUT
Analog audio output connector of Audio pin jack pin 2.
• HS_SP
Stereo mini jack connector: to connect headset (headphone).
• VIDEOOUT MONITOR(HDMI#3)
HDMI type A connector pin 19 to connect to monitor of audio and video signal.
• DSP devices(IC121,201)
This device is an IC to carry out audio processing (echo canceller/echo suppressor/AGC/equalizer) of transmitting and receiving
on audio signal other than input signal from digital microphone.
on audio signal other than input signal from digital microphone.
• FPGA devices(IC301) for KX-VC600
This device is an IC to frame convert audio signal from digital microphone.
Conduct connection with digital microphone and detect lighting and light-out of microphone LED of digital microphone, button
down of microphone.
It also can be used as shared memory of IC121 and 201.
Conduct connection with digital microphone and detect lighting and light-out of microphone LED of digital microphone, button
down of microphone.
It also can be used as shared memory of IC121 and 201.
Case 1
Case 2
Connected
Audio Sent
Connected
Audio Sent
(a) Head Set -Mic.
Yes
Yes
No
---
(b) Digital Boundary Mic. (DBM)
Yes
No
Yes
Yes
(c) Analog Boundary Mic. (ABM)
Yes
No
Yes
Yes
(d) General Purpose Mic.
[Audio pin jack]
[Audio pin jack]
Yes
Yes
Yes
Yes
NOTE
-.Audio (a) and (d) are mixed
-.Audio (b) (c) (d) are mixed.
Case 1
Case 2
Connected
Audio out
Connected
Audio out
(a) Head Set -SP.
Yes
Yes
No
---
(b) Audio out (Audio pin jack)
Yes
No
Yes
Yes
(c) TV speaker through HDMI
Yes
No
Yes
Yes
NOTE
The sound of (b) is the same as (c).
20
KX-VC300CX/KX-VC600CX
5 Location of Controls and
Components
5.1.
Name and Locations
5.1.1.
Main Unit (Front)
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