Design of Traditional Multimedia Conference Room Scheme
As depicted in the above figure, traditional intelligent audio and video integration systems consist of standalone devices with the core parts of each function (audio, video, control) operating independently. Ultimately, the central control device controls and manages the main equipment in the system for centralized control and management. However, this hardware architecture has numerous drawbacks. For instance:
The stacking of multiple devices makes installation, usage, and maintenance complex.
The cables are intricate and complex, resembling a spider web, making troubleshooting extremely difficult.
Each venue is independent of one another, and operation requires access to the venue equipment, making it impossible to achieve centralized and remote control.
New generation integrated digital multimedia control host.
To address the various drawbacks of traditional intelligent conference rooms, ADHOOPU has introduced a multimedia control host. By integrating functions such as a digital audio processor, high-definition hybrid switching matrix, central control host, splicing processor, codec, and a built-in MCU, users can possess a comprehensive modern audio-visual integrated system with just a single multimedia host.
Advantages of multimedia hosts:
Highly integrated, saving space.
Easy to install and maintain, reducing construction time.
Integrates multiple functions, avoiding disputes among multiple device manufacturers.
User-friendly operation without the need for professional training. Offers "one-click" visual operation.
Can be controlled via wireless touch screen.
Remote management and control can be achieved through web pages.
Enables centralized management, allows monitoring of remote images, and controls remote venues.
Overall scheme design
The standard conference room has a relatively limited space and generally adopts a round table layout. It is mainly utilized for daily internal meetings, video conferences, remote interviews, training sessions, etc.
The conference room for presentations has a large space and is usually equipped with a podium. It can be used for holding presentations, training sessions, and other related meetings.
Large screen display system
There are various types of large screens in the conference room, including indoor small-pitch LED, LCD splicing screen, DLP splicing screen, high-definition projector, and LCD TV. Small meeting rooms usually opt for projectors and LCD TVs, while large meeting rooms are more inclined to choose large-sized splicing screens.
At present, the industry's large-size display solutions mainly consist of technologies such as small-pitch LED, DLP, and LCD splicing. Below is a comparison of LED, DLP, and LCD splicing from multiple aspects.
Project | LED splicing | DLP splicing | LCD splicing | |
Technical characteristics | Advantage | Small dot spacing, flexible and versatile display area and resolution (modular and seamlessly assembled), 1080P, 16:9 display, high brightness with adjustable brightness and grayscale, and point-by-point correction function. | High-definition 1080P display with slow brightness attenuation (uneven brightness after long-term use) and gaps. Suitable for long-term display of computers and static images. High reliability and low power consumption. | Low power consumption, light weight, long lifespan (generally able to work normally for more than 50,000 hours), no radiation, uniform screen brightness. However, there is a possibility of brightness or color imbalance after long-term use. |
Shortcoming | A viewing distance of at least 3 meters is required. | The brightness is low, but it is suitable for long-term viewing. | It is difficult to enlarge the unit size and achieve seamless splicing. | |
Comparison of Splicing Wall Applications | Splicing seam size | No seams | Less than 0.5mm, the brightness at the joint is dim, which is prone to block diagram visual effects. | About 3.5mm, with a large number of seams, the overall effect is poor. |
Space and installation | Easy and fast installation, occupying less space. | Requires a large installation and maintenance space. | Ultra thin body, easy and fast installation, occupying less space. | |
Uniformity of the entire screen | The uniformity is good, and if there is brightness imbalance, point by point correction can be performed. The overall screen flatness is ≤ 0.1mm. | Due to the use of DLP technology, there is a tendency for brightness and color imbalance after long-term use. | It is difficult to adjust the color and brightness uniformity between each screen (due to the simple splicing process, non enclosed box type, and significant influence from ambient light). | |
Installation environment requirements | High power consumption, high electrical requirements, and low heat dissipation of die cast aluminum casing. | High power consumption, high demand for electricity, high heat output, and high requirements for decoration and air conditioning. | Low power consumption and low installation environment requirements. | |
Capital investment | Construction cost | high | higher | low |
Maintenance cost | Meet the requirement of 7 * 24-hour uninterrupted operation with a super long working life of 100000 hours. | 7x24 hour uninterrupted operation with an ultra long working life of 80000 hours. | 7 * 24-hour uninterrupted work A lifespan of 50000 to 100000 hours. | |
After an objective and multi-dimensional comparison and thorough analysis of the actual application needs and future development of conference room customers, it is found that small-pitch LED and LCD display solutions are more suitable for use as display screens in conference rooms.
Small pitch LED display solution
After thoroughly analyzing the customer's actual application needs and carefully examining the on-site environment, it was decided to use small pitch LED display products. The front-end display terminal will use P1.667 small pitch LED display screens.
Introduction of LED display screen parameters
Name | Parameters |
Point spacing/Point density | 1.667mm, 360000 pixels/square meter |
Screen size | 7680 m (width) × 2160 m (height)=12.55 ㎡ |
Screen resolution | 4080 columns x 1152 rows=4700160 pixels/screen |
Unit box size | 640mm (width) × 360mm (height) |
Quantity of Unit Boxes | 12 columns x 6 rows=72 |
Screen weight | 504KG |
Elevation view of LED display screen
The LED display screen can achieve the following display modes:
Full-screen display of a single image: Can be used for local conference material placement, video playback, high-definition image display, welcome word placement, etc.
Split-screen display of two images: Can display two images in left and right split screens. Used for holding video conferences, with one displaying the remote venue image and the other displaying the computer content image.
Multi-split screen display of multiple images: The large screen can achieve video display with any open window, suitable for displaying multiple video images simultaneously.
LCD splicing display scheme
The front-end display system of this scheme adopts LCD splicing screen as the terminal display intelligent system. The LCD splicing unit can work continuously 24 hours a day and has the characteristics of high reliability and stability to ensure the stable and reliable operation of the system. Due to its low power consumption, light weight, long lifespan, and no radiation, the LCD splicing wall has extremely high reliability and can generally work normally for more than 60,000 hours.
Introduction to LCD splicing screen parameters
Screen size | 55" |
Splicing gap | 3.5mm |
Appearance dimensions | 1211.5mm x 682.3mm |
Display scale | 16： 9 |
Physical resolution | 1920X1080 |
Brightness | 500cd |
Contrast ratio | 4500： 1 |
Response time | 8ms |
Viewing angle | 178 ° (horizontal/vertical) |
Power consumption | 190W |
Front view of LCD splicing screen
System architecture diagram
As shown in the above figure, the multimedia control host is the core equipment of modern multimedia conference room systems, which has the following functions:
Visual operation: provide a visual operation interface and an open software SDK interface for secondary integration development.
Ultra high definition: The high-speed matrix backplane supports 4K input, output, synthesis, and encoding.
Audio processor: built in 16 * 16 digital audio processor, supporting adaptive acoustic feedback cancellation AFC, echo cancellation AEC, automatic suppression ANS, variable sound effect processing, arbitrary matrix mixing grouping, etc.
Programmable central control: an open programmable central control that supports multiple interfaces such as RS232/485/IR/IO.
Ultra clear recording: built in 4K ultra clear recording, recording movies and resources simultaneously in multiple modes.
Interactive terminal: supports RTSP/H.263/SIP/MSIP and other multi protocol hybrid remote application modes.
Built in MCU: supports 4-party MCU interaction; Easy group interaction, seamless integration with mainstream third-party MCUs and terminals.
Streaming protocol: Supports protocols such as RTSP, RTMP, ONVIF, H.263, SIP, TS, and HTTP.
Image synthesis: provides multiple mode options such as 2/4/6/8, with resolutions of 4K/2K/1080P that can be set.
Streaming Protocol: supports RTSP/RTMP/ONVIF/H.263/SIP/TS/HTTP protocols.
The mixed torque input/output board can support seamless switching of seven types of signals including HDMI, DVI, VGA, AV, SDI, HDBaseT, and optical fiber.
Adopting an embedded hardware architecture, the system is stable and reliable. It realizes seamless switching without black screen, flashing screen, or delay.
Support EDID management and the HDCP protocol.
The front panel supports full-color LCD video monitoring and menu operations.
Supports LAN remote viewing of audio and video live broadcasts, device control, maintenance, and querying of system status.
Using a plug-in modular design, it can be flexibly expanded according to needs.
Supports access and operation through web pages, iPad, or client.
