Design of Traditional Multimedia Conference Room Scheme
As shown in the above figure, traditional intelligent audio and video integration systems form the core parts of each function (audio, video, control) as standalone devices, with each subsystem core device running independently, and ultimately controlled and managed by the central control device for centralized control and management of the main equipment in the system. This hardware architecture has many drawbacks. For example:
Stacking multiple devices makes installation, usage, and maintenance complex.
The cables are intricate and complex, like a spider web, making troubleshooting extremely difficult.
Each venue is independent of each other and requires access to the venue equipment for operation, making it impossible to achieve centralized and remote control.
New generation integrated digital multimedia control host
In order to address the various drawbacks of traditional intelligent conference rooms, HAIMINGWEI has launched a multimedia control host. By integrating functions such as digital audio processor, high-definition hybrid switching matrix, central control host, splicing processor, codec, and built-in MCU, users can have a comprehensive modern AV integrated system with just one multimedia host.
Advantages of Multimedia Hosts
Highly integrated, space saving
Easy to install and maintain, saving construction time
Integrate multiple functions to avoid disputes between multiple device manufacturers
Easy to operate, no need for professional training, "one click" visual operation
Can be controlled through wireless touch screen
Remote management and control can be achieved through web pages
Can achieve centralized management, monitor remote images, and control remote venues
Overall scheme design
The standard conference room has a relatively small space and generally adopts a round table layout. It is mainly used for daily internal meetings, video conferences, remote interviews, training, etc.
The conference room for presentations has a large venue and is usually equipped with a podium, which can hold presentations, training sessions, and other related meetings.
Large screen display system
There are many types of large screens in the conference room, such as indoor small pitch LED, LCD splicing screen, DLP splicing screen, high-definition projector, LCD TV, etc. Small meeting rooms usually choose projectors and LCD TVs, while large meeting rooms tend to choose large-sized splicing screens.
At present, the industry's large-size display solutions mainly include technologies such as small pitch LED, DLP, and LCD splicing. Below is a comparison of LED, DLP, and LCD splicing from multiple perspectives.
project | LED splicing | DLP splicing | 液晶拼接 | |
Technical characteristics | advantage | Small dot spacing, flexible and versatile display area and resolution (modular and seamlessly assembled) 1080P, 16:9 display, high brightness, 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 50000 hours), no radiation, uniform screen brightness, and the 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 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 actual application needs of the customer and carefully examining the on-site environment, it was decided to use small pitch LED display products, and the front-end display terminal will use P1.667 small pitch LED display screens.
Introduction to 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 60000 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: Provides 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
Splicing processor: In conjunction with the HMW-FBS series distributed system, it can achieve image stitching function, with a default of 8-screen stitching and a maximum support of 16 screen stitching.
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 HDMI DVI、VGA、AV、SDI、HDBHMWeT、 Seamless switching of 7 types of signals, including optical fibers.
Embedded hardware architecture, stable and reliable system, seamless switching without black screen, flashing screen, and delay.
Supports EDID management and HDCP protocol.
The front panel supports full-color LCD video monitoring and menu operations.
Support LAN remote viewing of audio and video live broadcasts, device control, maintenance, and system status queries;
Plug in modular design, which can be flexibly expanded according to needs;
Support web, iPad, or client access and operation.
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