1. Progress Report
Chester Liu
2014/05/27

2. DVC Hardware Modification
H264 intra encoder
Add a dedicated APB bus for mode register setting
Create a wrapper for the following modules
Enable the HREADY signal
Pull out AHB burst count
Add an AHB port for reconstructed frames
WZ encoder

3. DVC Hardware Modification
Wi-Fi controller
Stuck at a bug for 2 weeks
Tried many experiments, but none worked
Found the bug after days of experiments
Modify controller to always send 1KB TCP packets
Add empty buffer entry number output signal
Fix a design bug which would cause controller hang

4. DVC Hardware Modification
AHB bus matrix
Use the Perl script provided by ARM to generate Verilog code
Configuration
5 6 slave (input) ports and 5 master (output) ports
Fully connected
Fixed priority arbitration (round-robin arbitration file is missing from the package)
Output port selected by address bit [27:24], by default output port 0 is selected
E.g. Port 3 is selected if address lies within 0x ~0x03ffffff
E.g. Port 0 is selected if address lies within 0x ~0xffffffff

5. DVC Hardware Modification
New camera image sensor
OmniVision OV7670 VGA image sensor
Support: VGA / QVGA / CIF / QCIF
Smaller form factor compared to the one on SOCLE DTB
Adjustable focal length
Plenty I2C setting source code on the Internet

7. DVC Encoder Architecture

8. OpenDVC Debug Found a bug in decoder’s decodeSkipMask() function
The calculated WZ rate is lower than the actual value
Caused by the modification of frame buffer
Action item
Compare encode/decode result of OpenDVC with DVC2.1
Other things effecting decoding result
Compile optimization
-O3 v.s. none
Include header file
#include <cmath> v.s. #include “math.h”

9. OpenDVC Website In total 36 downloads 11 from unknown, German
8 from NTU, Taiwan
8 from unknown, USA
3 from DTU, Denmark
3 from unknown, Egypt
2 from Intel, USA
1 from unknown, Taiwan

10. Schedule DVC hardware OpenDVC H264 intra encoder only version done
Complete version (6/M)
OpenDVC
Compare OpenDVC with DVC2.1 (6/E)

11. Transfer Items Code Board Documentation
DVC HW code, demo SW code, and utility SW code
OpenDVC SW code
OpenDVC website
Board
Wi-Fi module daughter board
Camera daughter board
Documentation
DVC HW design and environment usage