Kaidi portable automatic / manual recording and broadcasting system

Project requirements:

1. System Overview:

The portable automatic / manual recording and broadcasting system is composed of an automatic manual portable recording and broadcasting all-in-one machine, a high-precision intelligent tracking camera, an intelligent guide master control machine, and a recording microphone. The automatic recording or manual recording is selected through the automatic / manual conversion switch The broadcast system is to connect 4 camera signals, 2 RGB signals, 6 audio signals and related control signals to the Kaidi portable recording, recording and editing machine. When automatic recording is selected, the Kaidi intelligent guide control system is based on the preset The program and control information imitate artificial intelligence guide switching and recording. When manual recording is selected, manually operate the high-definition digital mixed editing stunt station of the portable portable recording and editing machine to perform manual guide switching, recording and control the camera to push, roll and tilt. The front-end video is collected by various cameras (professional cameras, tracking cameras, positioning cameras, etc.), and the audio is collected by recording microphones, wireless headset microphones, and audio selection control systems. The entire system has both streaming video recording and broadcast levels Video recording, system professional, intelligent, portable and mobile, which greatly facilitates the recording of school quality courses.

2. System functions and requirements:

1. Video capture part:

Teacher image tracking system:

In the teacher image tracking system, the teacher tracking camera can automatically track the teacher's specific target. It uses image recognition technology to analyze the teacher's current location and notify the camera to track the shooting. This image tracking system is non-infrared technology or ultrasonic technology, and the tracking process is not interfered by the outside world. Using advanced intelligent image processing and control technology to control the smooth movement of the camera, it can lock the shooting target teacher in the center of the image, the teacher does not need to wear any sensors, the system is simple and reliable.

Student image positioning system:

Adopt advanced image behavior recognition algorithm to detect students' standing and sitting;

With automatic zoom function, it can automatically adjust the magnification of the camera according to the students' distance;

Can recognize multiple targets at the same time, when only one student stands up and speaks, the camera closes it up, when multiple students stand up and speaks, returns to the panorama;

Close-up collection part of the blackboard

When the teacher is writing on the blackboard, the close-up control of the blackboard is enabled for close-up shooting of the blackboard (the camera can be adjusted according to the vertical height of the teacher's writing);

2. Audio collection part:

Teachers wear wireless microphones:

Mount a professional recording microphone above the student area (the pickup distance is adjusted according to the classroom and student height):

When the lens is switched to the teacher, the teacher's head-mounted wireless microphone is turned on, and when the lens is switched to the student's close-up, the microphone at the front of the student is turned on to minimize noise.

3. Computer video output for teachers:

The teacher's computer VGA signal is output to the input terminal of the frequency divider (one-fourths), and the output terminal of the frequency divider is connected to the VGA input terminal of the portable recording, editing, recording and editing machine. When the teacher uses the courseware to teach through the computer At this time, the computer operation will be recorded, and the intelligent guide will switch to the courseware currently displayed on the teacher ’s computer screen. If the teacher ’s computer has no operation record for more than 10 seconds (time is adjustable), the intelligent guide will switch to the teacher ’s close-up.

4. Portable hand-automatic integrated machine:

Kaidi portable recording, recording and editing machine (KD-LCC900XB, KD-LCC900XD)

System hardware configuration i7 8-core CPU, 4G memory or more, dual Gigabit network interface, DVD burning, 500G SATA × 1 hard drive, 8-screen highlight display, 6-channel high-definition digital hardware mixed stunt and mixer, hardware HD Digital mixing, coding resolution is up to 720 × 576 (KD-LCC900XD coding resolution is up to 1920 × 1080), resolution can be adjusted arbitrarily, broadcast-grade digital hardware switcher, subtitle input keyboard, pure aluminum magnesium alloy portable all-in-one machine Hardware design and high-definition streaming media encoding and recording broadcast system;

Video acquisition and editing configuration hardware digital high-definition mixed stunt station, video hardware digital high-definition upgrade, hardware mixed core 1280 × 1024 resolution, AV, S, HDMI, RGB simultaneous input and output, broadcast-grade high-definition digital streaming media acquisition and editing card; recording and live The video resolution is up to 720 × 576, the code rate is steplessly adjustable from 1kbps to 15Mbps, and the video dual-track single-key hardware switching;

The encoder is equipped with an independent high-definition audio and video encoding and recording system, which can simultaneously record MPEG2, AVI-DV, AVI-uncompressed, any resolution of AVI; an independent high-definition streaming media encoding, live broadcast and recording system (wmv and flv), while Multi-channel input collection and multi-channel program broadcasting; regular recording and sequence broadcast, can simultaneously broadcast and publish wmv, flv two file formats, the recording file is wmv for easy post-editing or VOD import of data, recording is divided into automatic recording and manual recording , Support 7 × 24 hours automatic pre-made recording and sorting broadcast;

The encoder function independently provides the recording of various AVI original files, independently provides various streaming media file encoding, live broadcast and recording, and the code stream is adjustable. It can be cross-network segment and cross-route. It supports LAN and WAN; supports user rights setting management , Online user information display, etc .; the client supports IE plug-in playback, media player and flash player; supports live distribution in the WAN, provides distributed forwarding function, supports WMS and FMS; complex network adaptation, multicast, direct Automatic selection of connection mode;

Encoder effect Video coding has stepless regulation from 1kbps to 15Mbps, making it adaptable to any network requirements. Under the stream of 100kbps, it provides clear and smooth CIF video images at 25 frames per second, and the VGA image quality can reach VGA image quality at about 200kbps, and the DVD image quality video can be achieved at about 300 kbps.

Mixed-effect stunt station function Hardware high-definition digital mixed stunt station, 8-picture highlight display, 4 video inputs, 2 video component inputs, 2 VGA inputs, etc., six-channel hardware HD digital mixed stunt station; hardware HD digital Mixed core, mixed output 1 composite video, 1 S output, 1 RGB output, and 2 video coding outputs made by digital mixed editing special effect switching line (two outputs with the same signal, different code rate and different resolution) ); Real-time subtitles, clock, station logo, Jingzhen; built-in mixer, video transition, wipe, fade, fade, picture-in-picture, etc., A, B track video conversion and multi-mode, etc .;

Audio processing and input and output audio multi-level op amp high-gain hardware processing, 2 microphone inputs (professional microphone XLR balanced input × 2 and BAL unbalanced input × 2; provides 48V phantom power; treble and bass adjustment; 5 stereo inputs, Audio mixing and tuning, 1 stereo output;

Video processing and input and output professional studio multi-camera video and RGB hardware high-definition digital mixing effect switching, multi-input video preview display and 2 channel video display with effect switching, full Chinese hardware effect switching, tuning and mixing, Video hard disk recording and recording and broadcasting, editing and editing of recorded files, and live audio and video live broadcast in one; support simultaneous live broadcast program preview output, 10-channel broadcast, hard disk timing recording and hard disk timing broadcast;

The dual stream broadcast broadcasts the same live program to viewers through the network at different streams and resolutions at the same time to meet the viewing needs of different network environments. It can be recorded as a live stream of small stream (320 × 240) video 720 × 576, 15Mbps video files or corresponding AVI files, directly burned to DVD disc for data storage;

Camera Control Provides wireless remote control devices for 4 cameras, which can remotely control the camera to push, pull, pan, tilt, and tilt, saving shooting staff and reducing shooting staff interference on the shooting site;

Multi-camera recording Provide original 4-camera 4-channel video high-definition simultaneous recording for easy post-editing;

Professional subtitles Modular professional subtitles, what you see, pre-made subtitles, overlay switching;

The virtual studio system provides a multi-camera virtual studio system

Power supply Multi-power supply, magnetic suspension silent fan;

Interface video VIDEO IN × 4 (BNC / S); video VIDEO OUT × 2 (BNC / S); stereo (LEFT, RIGHT) IN × 5; professional microphone (48V) XLR × 2; microphone Ф6.3LINE × 2; Stereo (LEFT, RIGHT) OUT × 1; RGB IN × 2 (D-15); RGB OUT × 1 (D-15); monitor Ф3.5 × 1; MICФ3.5 × 1; network RJ45 (1000 trillion) × 2; USB2.0 × 2;

Portable all-in-one machine The portable all-in-one machine includes air box packaging, and its external dimensions meet the domestic aviation cabin luggage carrying standard (20 × 40 × 55), and the weight does not exceed the prescribed weight;

1. The principle of Kaidi intelligent guide system:

Block diagram of system working principle:

Working principle of the system:

This system uses the teacher tracking gimbal camera to complete the filming of the teacher's teaching work. This camera can track the teacher's movement, and can also detect the switch signal of the blackboard sensor to take close-up shots of the blackboard. The camera used to record the students' classroom speeches uses the student tracking gimbal camera. This camera can automatically identify and track students who stand up to speak and take close-up shots. The VGA signal of the teacher's teaching computer is also connected to the all-in-one recording and editing machine to participate in the intelligent or manual guide switching.

The teacher's lecture tracking camera, the student's speech recognition recognition tracking camera, the blackboard sensor and the teacher's lecture computer operation record sensor will give the corresponding control signal to the automatic pilot master control. According to a certain priority, the automatic broadcast master control controls the broadcast station on the live broadcast machine through the 232 bus to switch the corresponding video signal out for recording. When the automatic navigation master control and the live broadcast machine are connected normally and the automatic broadcast button on the live broadcast machine is pressed, the system is in the automatic broadcast state, otherwise the system is in the manual state. The 485 bus in the system is used to transmit the all-in-one recording and editing machine and the automatic guide main control to control the shooting behavior of the camera and perform intelligent guide switching control. The manual state can be controlled by the camera control function of the camera on the integrated recording, editing and editing machine to manually shoot.

Features of video teaching by teachers:

1. The tracking target is automatically locked, and the tracking process is not affected by the ambient light source;

2. The tracking and shielding area can be set by oneself, one tracking area and multiple shielding areas can be set;

3. The image center can be adjusted by itself during tracking, the horizontal tracking speed can be adjusted by itself, and the vertical tracking speed can be adjusted by itself;

4. The target loss time can be set; after the target is lost, the action can be returned to the preset point to keep the original position;

5. With automatic zoom function, it can automatically adjust the magnification of the camera according to the distance of the target;

6. The tracking process is very stable, and there is no obvious shaking of the video;

7. The camera has a backlight compensation function, and the entire picture can be seen clearly in a strong light background environment;

8. Close-up function of blackboard writing, when the teacher walks into the blackboard writing area, the camera can shoot the teacher's blackboard writing clearly and stably according to the preset lens stretching size and height;

Features of video shooting for students' standing speeches:

1. With automatic zoom function, the camera magnification can be adjusted automatically according to the distance of the target;

2. Can recognize multiple targets at the same time. When only one student stands up to speak, the camera closes it up. When multiple students stand up to speak, it returns to the panorama;

3. Not limited by the size and form of the classroom, large classrooms and ladder classrooms can also be tracked normally;

4. The tracking process is very stable, and there is no obvious shaking of the video;

5. The camera has a backlight compensation function, and the entire picture can be seen clearly in a strong light background environment;

6. The delay of student answer can be set, and the student will automatically pull back to the panorama after standing overtime;

7. The average height and sensitivity of the students can be set to meet the height requirements of each grade;

3. System equipment configuration and list:

Kaidi automatic (manual) recording and broadcasting system equipment configuration and list:

Serial number

name

Quantity

unit

Remarks

1

Teacher-tracking automatic tracking camera (SONY) and teacher target locking and tracking high-speed processor (smart motion analysis target image smooth tracking) KD-GB200T

1

set

Normal teaching (no need to wear and operate any objects), moving image shooting is very stable

2

Student speech automatic tracking camera (SONY) and student target locking and tracking high-speed processor (intelligent behavior analysis target image smooth close-up) KD-FB200S

1

set

Normal teaching (no need to wear and operate any objects), moving image shooting is very stable

3

Blackboard shooting control system (close-up shooting and smooth tracking) KD-BT100

1

set

4

Teacher computer courseware shooting control system KD-CT100

1

set

5

Automatic guide master control machine (video automatic intelligent guide control and audio automatic control machine) KD-A3000C

1

set

Can control 12 microphones

6

Kaidi portable recording, recording and editing machine KD-LCC900XB

1

station

See technical features for details

7

Wireless headband microphone

1

set

8

Recording microphone and mounting frame (6 sets of which are microphone frames)

6

set

9

Various mounting brackets

1

set

Meet fixed installation requirements

10

Automatic camera tripod (2.5 meters for students, 1.8 meters for teachers)

1

set

Meet mobile requirements (optional)

11

Cable

1

set

Meet fixed installation requirements

12

Cable

1

set

Meet mobile requirements (optional)

Beijing Kaidi Xingye Network Technology Co., Ltd.

July 2011

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