1. Design of Multiple Interactive Access between STB and Mobile Devices
Dr. Mingoo Kang
(Prof. of Hanshin University)

2. Introduction of MAI (Multi Access Interactive)
TV broadcaster TV
signal
DSM-CC data carousel
(interactive data)
Play-out
satellite
or any MPEG-based stream
STB
Back channel data_1
Back channel data_2
GPRS/UMTS
(return interactive data_1)
Ethernet
(return interactive data_2)
Telco ASP (GSM SMS )
Internet ASP
Bluetooth, WUSB, WLAN,
Wibro…..
Device
Multiple interactive access between STB(Set-top Box) and mobile devices was proposed for content sharing with BT(Bluetooth) or WUSB(Wireless USB)

3. MAI (Multi Access Interactive) Platform : STB-2
■ DVB-T/S2 MPEG-4 HD PVR Combo STB : VFD, 32Bit High-resolution OSD
2W (Standby Low power consumption)
Bluetooth (Class1) / WUSB(UWB) based Telecommunications with Mobile Devices[PMP)
Embedded HCI S/W : (Linux OS)
BCHS(Blue Core Host Software) OS Porting
Time Scheduling
Application(SPP, Connect & Link) Task
Inquiry & Pairing
Data Send & Receive(UART or USB Interface)

4. MAI (Multi Access Interactive) Platform : Mobile Device-1(PMP)
TI Davinci Solution : K-mobile U48X
T-DMB (Mobile TV) : DRM, Navigation
GUI, A/V Player, Image Viewer etc.
A/V Recording MAI services
Wi-Fi based Return Path : Browser
1. OS
Win CE 5.0 Core/Professional
2. Mobility
60mile/h
3. HDD Access
10 msec
4. CAS Descrambling Time
1.3 sec
5. Zapping Time  
(Free channel)
300msec
6. User Interface
Interactive User Interface 61 Standard Keyboard
7. Outer Design
4.8" WVGA (800×480)
8. Outer Interface
USB 2.0 / USB Host USB Device / Active Sync
9. inner Interface
Wi-Fi Secure Digital Input/Output

5. Down Request for Selected List BT_CMD_DOWNREQUST:xxxx
DEMO of MAI (Multi Access Interactive) with Bluetooth
■ DATA Tx. (Bluetooth)
BT_CMD _CONNECT
Content List Tx(Sharing)
Process
BT_CMD _CONTSNOTI
Down Request for Selected List
(Selected List No. Tx.)
BT_CMD _DOWNSTART
BT_CMD _TOTALBLOCK
Process
Process
Down Block Request
BT_CMD_DOWNREQUST:xxxx
DATA Trans.
1 Block + Checksum Tx.
Checksum DOWNREQUEST
Process
BT_CMD _CRCCHECK No
CMD_REPLYCRC
ALL CRC OK ?
Yes
Process
BT_CMD _DOWNALLSUCC
붉은색 : 추가/수정 항목 – STB에서 공유할 컨텐츠 목록을 전송 해줌

6. DEMO of MAI (Multi Access Interactive) with WUSB
■ DATA Tx. (WUSB)
STB real-time Recovery with WUSB
STB
Recording File
Multimedia Contents
(video, audio, image)
Content File with WUSB
Multimedia Contents
(video, audio, image)
Recovery Rx. File form Mobile(PMP)

7. DEMO of MAI with PMP(Mobile Device)
■ Content Tx. / STB Controlled Scenario
BT_CMD_CONTSNOTI
BT_CMD_DOWN START
STB Request
Play
STB Download
PMP(Mobile Device)
STB Command, STB Message

8. DEMO of MAI Interfaces with PMP(Mobile Device)
■ MAI서 Applications
MAI Data File (DCM-CC Data Carousel)
Bluetooth Search, Pairing, Connection, Rx/Tx (USB to UART Middleware (FTDI))
< MAI Application– BT. Connection >
< PMP Bluetooth  Comm >

9. Conclusion of MAI Services
Bluetooth (Class 1) : Embedded HCI S/W
Point-to-Multipoint , MultipointConnect, Disconnect, Rx/Tx
(EDR–Enhanced Data Rate) , Multimedia WUSB(SiP, EMI/EMC, ESD, Packaging]
(WLAN, Bluetooth) Coexistence Test
Wireless USB
Wireless USB Application S/W
File System (FAT-16/32, Ext2/3)
GUI(Graphic User Interface)
Enhanced EPG (Electronic Program Guide), IP Protocol
 New STB Platform for Multi Access Interactive of Mobile Devices
with Bluetooth, and Wireless USB.
 Future Works for Smart Home Gateway with Mobile Interfaces
(Energy Saving Home/Office, Low Power Consumption for Devices)