ICT Today

July/August/September 2020 I 31 FIGURE 1: Depiction of the sightline study used to determine the optimal viewing distance and angle for each student. for less rack space (in this case a credenza), less transmitters requiring a smaller matrix switcher, and less cooling and electrical requirements. In the second concept design, two 90-inch displays would still be mounted at the front of the classroom. However, instead of dedicated monitors for each student, two 55-inch displays would hang above the third row, thereby reorienting sightlines for the back half of the room, which would give each student an adequate view of a display as shown in Figure 1. By saving money on the individual dis- plays while retaining the scalability of AVoIP com- ponents, this second design was considered very cost efficient. The design's use of a mixed HDBaseT and AVoIP system would allow greater scalability and cost savings because there would be no one-to-one connections between transmitters and receivers. In a system using only HDBaseT, feeding a signal to every monitor would require a transmitter in the matrix switcher and a receiver at the desk. Conversely, since everything is IP-based, the introduction of an AVoIP system would allow an endless amount of receivers to one transmitter. This configura- tion would give instructors multiple inputs and a direct feed to the 90-inch displays from which they would be instructing. From an HDBaseT matrix switcher feed, an AVoIP transmitter would be connected to a receiver at each of the student's desk monitors. This would allow FIGURE 2: Shown is the finished product when the correct planning, design and implementation is achieved. Ultimately, a hybrid of the two design options was implemented, wherein all the AVoIP equipment was provided at the students' desks for future use. Furthermore, since the system already incorporated the AVoIP encoder, decod- ers were provided for two 55-inch displays over the third row as shown in the final solution in Figure 2. The multipurpose and collaboration spaces on the building's fourth floor also utilize one AV system despite being two separate areas. The multipurpose room can open out into the col- laboration space. Meetings can be held in the multipurpose room, but both areas can be com- bined for larger town halls and presentations that have larger audiences. Displays are mounted in both areas. 90" FLAT PANEL DISPLAY 62 1/2" 82" 167"

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