A Cell-Loss Concealment Technique for MPEG-2 Coded Video

Jian Zhang, John F. Arnold,

and Michael R. FraterIEEE Transaction on Circuit and System for video Technology

June 2000

Error Resilience Techniques

Error detection Resynchronization Data recovery Concealment

…

MB header

slice headerResync. marker

Resync. marker

Boundary Matching Alg.(BMA)

LostMB

Lost MV

Prev. Frame Current Frame

if pixel values weighted sum compared to the boundary is the minimum, this is the lost block.

Decoder Motion-Vector Estimation Algorithm (DMVE)

LostMB

Lost MV

Prev. Frame Current Frame

Full search or fast search in prev. (or Ref.) Frame

found

Experimental Results

Original error-free PSNR:28.38db bus:30.71dB

Original error-free PSNR:28.38db bus:30.71dB

DMVE with Resynchronisation

DMVE has better quality when each slice has more macroblocks .

using the MV from the macroblock above

DMVE

Flower Garden

Bus

using the MV from the macroblock above DMV

E

Conclusion DMVE algorithm can significantly

increase decoded video quality even at high cell-loss rates(1% or more)

Developed a number of different implementations of DMVE algorithm which allowed a trade-off to be mode between extra computational complexity