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Two-way hybrid teaching EDU-03

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Choose a view, then a route, connection or device. Lines retain their original direction. Repeated device IDs refer to the same equipment across views.

Two camera captures feed the conferencing PC. Remote sound returns to the room and recording, with a separate outgoing microphone mix.

Video & data

Signal flow. Devices, connections and conditions follow the drawing.Open SVG ↗
EDU-03 · Video & dataReference design. Two SDI cameras use two USB capture devices. The conferencing PC sends and receives remote media. Microphone send excludes remote return; the DSP uses playback as the AEC reference. Room and recording mixes are distinct. One HDMI programme is recorded, not all camera sources separately. REFERENCE DESIGN · PER ROOM Solid: media/data. Dashed: control/status. Room switch ×1 + installation set ×1; capture and audio share PC USB resources. Room mix excludes audience-zone voice lift unless separately designed. Return audio is excluded from USB send; content audio is shared by the application. Two selectable cameras do not guarantee simultaneous delivery of both views. Repeated device identifiers refer to the same equipment across views. Equipment illustrations are schematic; labels define quantities.{"sourceHash":"aff991b6b65b9a1c764db780b246d6a44bd5fcc7f8b11308a4879c48d114c95a","view":"signal","nodes":["CAM","CAP","PC","REMOTE","DA","SCREEN","SCREEN2","REC","MEDIA","REPO"],"edges":["L01","L02","L03","L09","L10","L11","L12","L14","L15"]}PIXEL COMMAND SOLUTIONS / EDU-03 / VIDEO & DATAVideo & dataREFERENCE DESIGN · PROJECT VALIDATION REQUIREDCAM → CAP: 2 SDI routes2 × SDICAP → PC: 2 USB video inputs2 × USB videoPC ↔ REMOTE: IP: two-way call + shared contentTwo-way IP callPC → DA: AV output A: HDMI programmeOutput A · HDMIDA → SCREEN: HDMIHDMIPC → SCREEN2: AV output B: HDMI / DPOutput B · HDMI / DPDA → REC: HDMI: programme videoHDMI programmeREC → MEDIA: Local writeLocal writeREC → REPO: IP: agreed upload workflowAgreed IP uploadPTZ cameras ×2 Presenter / audience Separate DC powerCAMPTZ cameras ×2SDI-to-USB capture ×2CAPSDI-to-USB capture ×2Teaching / conferencing PC ×1 Operator monitor included Camera selection + content sharingPCTeaching /conferencing PC ×1Remote participants Institutional conferencing serviceREMOTERemote participantsHDMI DA ×1 1 input / 2 outputsDAHDMI DA ×1Main display ×1SCREENMain display ×1Remote-participant display ×1SCREEN2Remote-participantdisplay ×1Recorder ×1 Embedded HDMI audio disabledRECRecorder ×1Recording medium ×1MEDIARecording medium ×1Institutional repository ×1 serviceREPOInstitutionalrepository ×1 serviceVideo / LED dataUSB / KVMNetwork / data
Devices, connections & design conditions 9 connections
  • PTZ cameras ×2; Presenter / audience; Separate DC power → SDI-to-USB capture ×2: 2 SDI routes.
  • SDI-to-USB capture ×2 → Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing: 2 USB video inputs.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing ↔ Remote participants; Institutional conferencing service: IP: two-way call + shared content.
  • Microphone channels ×3; Lecturer + 2 audience zones → AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme: 3 analogue mic inputs.
  • AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme → Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing: USB send: mic mix only.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing → AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme: USB receive: far end + programme.
  • AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme → Amplifier ×1: Line 1: room mix.
  • Amplifier ×1 → Loudspeakers ×4: Speaker lines.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing → HDMI DA ×1; 1 input / 2 outputs: AV output A: HDMI programme.
  • HDMI DA ×1; 1 input / 2 outputs → Main display ×1: HDMI.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing → Remote-participant display ×1: AV output B: HDMI / DP.
  • HDMI DA ×1; 1 input / 2 outputs → Recorder ×1; Embedded HDMI audio disabled: HDMI: programme video.
  • AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme → Recorder ×1; Embedded HDMI audio disabled: Line 2: microphones + far end + programme.
  • Recorder ×1; Embedded HDMI audio disabled → Recording medium ×1: Local write.
  • Recorder ×1; Embedded HDMI audio disabled → Institutional repository ×1 service: IP: agreed upload workflow.
  • Integrated panel/controller ×1 → PTZ cameras ×2; Presenter / audience; Separate DC power: IP VISCA: presets (control/status/authorisation).
  • Integrated panel/controller ×1 → AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme: IP: level / mute (control/status/authorisation).
  • Integrated panel/controller ×1 → Recorder ×1; Embedded HDMI audio disabled: IP API: record start / stop (control/status/authorisation).
  • Recorder ×1; Embedded HDMI audio disabled → Integrated panel/controller ×1: IP API: recording state (control/status/authorisation).
  • Integrated panel/controller ×1 → Recording indicator ×1: GPIO: actual state (control/status/authorisation).
  • Integrated panel/controller ×1 → Main display ×1: Serial: display power (control/status/authorisation).
  • Integrated panel/controller ×1 → Remote-participant display ×1: Serial: display power (control/status/authorisation).
CAM
PTZ cameras ×2 Presenter / audience Separate DC power
CAP
SDI-to-USB capture ×2
PC
Teaching / conferencing PC ×1 Operator monitor included Camera selection + content sharing
REMOTE
Remote participants Institutional conferencing service
DA
HDMI DA ×1 1 input / 2 outputs
SCREEN
Main display ×1
SCREEN2
Remote-participant display ×1
REC
Recorder ×1 Embedded HDMI audio disabled
MEDIA
Recording medium ×1
REPO
Institutional repository ×1 service
  1. CAM → CAP2 SDI routes
  2. CAP → PC2 USB video inputs
  3. PC ↔ REMOTEIP: two-way call + shared content
  4. PC → DAAV output A: HDMI programme
  5. DA → SCREENHDMI
  6. PC → SCREEN2AV output B: HDMI / DP
  7. DA → RECHDMI: programme video
  8. REC → MEDIALocal write
  9. REC → REPOIP: agreed upload workflow

REFERENCE DESIGN · PER ROOM Solid: media/data. Dashed: control/status. Room switch ×1 + installation set ×1; capture and audio share PC USB resources. Room mix excludes audience-zone voice lift unless separately designed. Return audio is excluded from USB send; content audio is shared by the application. Two selectable cameras do not guarantee simultaneous delivery of both views.

Audio & return paths

Signal flow. Devices, connections and conditions follow the drawing.Open SVG ↗
EDU-03 · Audio & return pathsReference design. Two SDI cameras use two USB capture devices. The conferencing PC sends and receives remote media. Microphone send excludes remote return; the DSP uses playback as the AEC reference. Room and recording mixes are distinct. One HDMI programme is recorded, not all camera sources separately. REFERENCE DESIGN · PER ROOM Solid: media/data. Dashed: control/status. Room switch ×1 + installation set ×1; capture and audio share PC USB resources. Room mix excludes audience-zone voice lift unless separately designed. Return audio is excluded from USB send; content audio is shared by the application. Two selectable cameras do not guarantee simultaneous delivery of both views. Repeated device identifiers refer to the same equipment across views. Equipment illustrations are schematic; labels define quantities.{"sourceHash":"aff991b6b65b9a1c764db780b246d6a44bd5fcc7f8b11308a4879c48d114c95a","view":"audio","nodes":["PC","MICS","DSP","AMP","SPK","REC"],"edges":["L04","L05","L06","L07","L08","L13"]}PIXEL COMMAND SOLUTIONS / EDU-03 / AUDIO & RETURN PATHSAudio & return pathsREFERENCE DESIGN · PROJECT VALIDATION REQUIREDMICS → DSP: 3 analogue mic inputs3 analogue mic inputsDSP → PC: USB send: mic mix onlyUSB send: mic mix onlyPC → DSP: USB receive: far end + programmeUSB receive: far end +programmeDSP → AMP: Line 1: room mixLine 1: room mixAMP → SPK: Speaker linesSpeaker linesDSP → REC: Line 2: microphones + far end + programmeLine 2: microphones +far end + programmeTeaching / conferencing PC ×1 Operator monitor included Camera selection + content sharingPCTeaching /conferencing PC ×1Microphone channels ×3 Lecturer + 2 audience zonesMICSMicrophone channels ×3AEC audio processor ×1 AEC on microphone inputs Reference: far end + programmeDSPAEC audio processor ×1Amplifier ×1AMPAmplifier ×1Loudspeakers ×4SPKLoudspeakers ×4Recorder ×1 Embedded HDMI audio disabledRECRecorder ×1AudioUSB / KVM
Devices, connections & design conditions 6 connections
  • PTZ cameras ×2; Presenter / audience; Separate DC power → SDI-to-USB capture ×2: 2 SDI routes.
  • SDI-to-USB capture ×2 → Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing: 2 USB video inputs.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing ↔ Remote participants; Institutional conferencing service: IP: two-way call + shared content.
  • Microphone channels ×3; Lecturer + 2 audience zones → AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme: 3 analogue mic inputs.
  • AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme → Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing: USB send: mic mix only.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing → AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme: USB receive: far end + programme.
  • AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme → Amplifier ×1: Line 1: room mix.
  • Amplifier ×1 → Loudspeakers ×4: Speaker lines.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing → HDMI DA ×1; 1 input / 2 outputs: AV output A: HDMI programme.
  • HDMI DA ×1; 1 input / 2 outputs → Main display ×1: HDMI.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing → Remote-participant display ×1: AV output B: HDMI / DP.
  • HDMI DA ×1; 1 input / 2 outputs → Recorder ×1; Embedded HDMI audio disabled: HDMI: programme video.
  • AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme → Recorder ×1; Embedded HDMI audio disabled: Line 2: microphones + far end + programme.
  • Recorder ×1; Embedded HDMI audio disabled → Recording medium ×1: Local write.
  • Recorder ×1; Embedded HDMI audio disabled → Institutional repository ×1 service: IP: agreed upload workflow.
  • Integrated panel/controller ×1 → PTZ cameras ×2; Presenter / audience; Separate DC power: IP VISCA: presets (control/status/authorisation).
  • Integrated panel/controller ×1 → AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme: IP: level / mute (control/status/authorisation).
  • Integrated panel/controller ×1 → Recorder ×1; Embedded HDMI audio disabled: IP API: record start / stop (control/status/authorisation).
  • Recorder ×1; Embedded HDMI audio disabled → Integrated panel/controller ×1: IP API: recording state (control/status/authorisation).
  • Integrated panel/controller ×1 → Recording indicator ×1: GPIO: actual state (control/status/authorisation).
  • Integrated panel/controller ×1 → Main display ×1: Serial: display power (control/status/authorisation).
  • Integrated panel/controller ×1 → Remote-participant display ×1: Serial: display power (control/status/authorisation).
PC
Teaching / conferencing PC ×1 Operator monitor included Camera selection + content sharing
MICS
Microphone channels ×3 Lecturer + 2 audience zones
DSP
AEC audio processor ×1 AEC on microphone inputs Reference: far end + programme
AMP
Amplifier ×1
SPK
Loudspeakers ×4
REC
Recorder ×1 Embedded HDMI audio disabled
  1. MICS → DSP3 analogue mic inputs
  2. DSP → PCUSB send: mic mix only
  3. PC → DSPUSB receive: far end + programme
  4. DSP → AMPLine 1: room mix
  5. AMP → SPKSpeaker lines
  6. DSP → RECLine 2: microphones + far end + programme

REFERENCE DESIGN · PER ROOM Solid: media/data. Dashed: control/status. Room switch ×1 + installation set ×1; capture and audio share PC USB resources. Room mix excludes audience-zone voice lift unless separately designed. Return audio is excluded from USB send; content audio is shared by the application. Two selectable cameras do not guarantee simultaneous delivery of both views.

Control & status

Signal flow. Devices, connections and conditions follow the drawing.Open SVG ↗
EDU-03 · Control & statusReference design. Two SDI cameras use two USB capture devices. The conferencing PC sends and receives remote media. Microphone send excludes remote return; the DSP uses playback as the AEC reference. Room and recording mixes are distinct. One HDMI programme is recorded, not all camera sources separately. REFERENCE DESIGN · PER ROOM Solid: media/data. Dashed: control/status. Room switch ×1 + installation set ×1; capture and audio share PC USB resources. Room mix excludes audience-zone voice lift unless separately designed. Return audio is excluded from USB send; content audio is shared by the application. Two selectable cameras do not guarantee simultaneous delivery of both views. Repeated device identifiers refer to the same equipment across views. Equipment illustrations are schematic; labels define quantities.{"sourceHash":"aff991b6b65b9a1c764db780b246d6a44bd5fcc7f8b11308a4879c48d114c95a","view":"control","nodes":["CAM","DSP","SCREEN","SCREEN2","REC","CTRL","LAMP"],"edges":["L16","L17","L18","L19","L20","L21","L22"]}PIXEL COMMAND SOLUTIONS / EDU-03 / CONTROL & STATUSControl & statusREFERENCE DESIGN · PROJECT VALIDATION REQUIREDCTRL → CAM: IP VISCA: presetsIP VISCA: presetsCTRL → DSP: IP: level / muteIP: level / muteCTRL → REC: IP API: record start / stopIP API: record start /stopREC → CTRL: IP API: recording stateIP API: recording stateCTRL → LAMP: GPIO: actual stateGPIO: actual stateCTRL → SCREEN: Serial: display powerSerial: display powerCTRL → SCREEN2: Serial: display powerSerial: display powerPTZ cameras ×2 Presenter / audience Separate DC powerCAMPTZ cameras ×2AEC audio processor ×1 AEC on microphone inputs Reference: far end + programmeDSPAEC audio processor ×1Main display ×1SCREENMain display ×1Remote-participant display ×1SCREEN2Remote-participantdisplay ×1Recorder ×1 Embedded HDMI audio disabledRECRecorder ×1Integrated panel/controller ×1CTRLIntegratedpanel/controller ×1Recording indicator ×1LAMPRecording indicator ×1Control / status
Devices, connections & design conditions 7 connections
  • PTZ cameras ×2; Presenter / audience; Separate DC power → SDI-to-USB capture ×2: 2 SDI routes.
  • SDI-to-USB capture ×2 → Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing: 2 USB video inputs.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing ↔ Remote participants; Institutional conferencing service: IP: two-way call + shared content.
  • Microphone channels ×3; Lecturer + 2 audience zones → AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme: 3 analogue mic inputs.
  • AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme → Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing: USB send: mic mix only.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing → AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme: USB receive: far end + programme.
  • AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme → Amplifier ×1: Line 1: room mix.
  • Amplifier ×1 → Loudspeakers ×4: Speaker lines.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing → HDMI DA ×1; 1 input / 2 outputs: AV output A: HDMI programme.
  • HDMI DA ×1; 1 input / 2 outputs → Main display ×1: HDMI.
  • Teaching / conferencing PC ×1; Operator monitor included; Camera selection + content sharing → Remote-participant display ×1: AV output B: HDMI / DP.
  • HDMI DA ×1; 1 input / 2 outputs → Recorder ×1; Embedded HDMI audio disabled: HDMI: programme video.
  • AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme → Recorder ×1; Embedded HDMI audio disabled: Line 2: microphones + far end + programme.
  • Recorder ×1; Embedded HDMI audio disabled → Recording medium ×1: Local write.
  • Recorder ×1; Embedded HDMI audio disabled → Institutional repository ×1 service: IP: agreed upload workflow.
  • Integrated panel/controller ×1 → PTZ cameras ×2; Presenter / audience; Separate DC power: IP VISCA: presets (control/status/authorisation).
  • Integrated panel/controller ×1 → AEC audio processor ×1; AEC on microphone inputs; Reference: far end + programme: IP: level / mute (control/status/authorisation).
  • Integrated panel/controller ×1 → Recorder ×1; Embedded HDMI audio disabled: IP API: record start / stop (control/status/authorisation).
  • Recorder ×1; Embedded HDMI audio disabled → Integrated panel/controller ×1: IP API: recording state (control/status/authorisation).
  • Integrated panel/controller ×1 → Recording indicator ×1: GPIO: actual state (control/status/authorisation).
  • Integrated panel/controller ×1 → Main display ×1: Serial: display power (control/status/authorisation).
  • Integrated panel/controller ×1 → Remote-participant display ×1: Serial: display power (control/status/authorisation).
CAM
PTZ cameras ×2 Presenter / audience Separate DC power
DSP
AEC audio processor ×1 AEC on microphone inputs Reference: far end + programme
SCREEN
Main display ×1
SCREEN2
Remote-participant display ×1
REC
Recorder ×1 Embedded HDMI audio disabled
CTRL
Integrated panel/controller ×1
LAMP
Recording indicator ×1
  1. CTRL → CAMIP VISCA: presets
  2. CTRL → DSPIP: level / mute
  3. CTRL → RECIP API: record start / stop
  4. REC → CTRLIP API: recording state
  5. CTRL → LAMPGPIO: actual state
  6. CTRL → SCREENSerial: display power
  7. CTRL → SCREEN2Serial: display power

REFERENCE DESIGN · PER ROOM Solid: media/data. Dashed: control/status. Room switch ×1 + installation set ×1; capture and audio share PC USB resources. Room mix excludes audience-zone voice lift unless separately designed. Return audio is excluded from USB send; content audio is shared by the application. Two selectable cameras do not guarantee simultaneous delivery of both views.

Typical architecture · not a project drawing

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