Interview at Ambrado.

1. typedef struct element

{

    unsigned int a;

unsigned int b;

unsigned int c;

unsigned long long d;

unsigned long long e;

unsigned char f;

}element;

what about sizeof(element)? 

Key: it should be 40. how to put them into 32, I do not how to figure it about.

2. give 16 unsigned integer number, computing the round average value, only limited unsigned integer number.

unsinged int avg(unsinged int arr[16])

{

   unsigned int sum1 = 0;

   unsigned int sum2 = 0;

   unsinged int avg_val;

   for(int i=0;i<16;i++)
  {

      sum1 += arr[i]>>4;

      sum2 + = arr[i]&0xf

  }

   avg_val = sum1+(sum2+8)>>4;

  return avg_val;

}

3. How about SIMD architecture, should be more familar with DSP optimizaiton.

 Key:

loop unrolling; 

DMA techniques to move data from memory;

software pipeline;

SIMD to take care of parallel processing;

some intrinsic instructions.

4. How about entropy coding? I should take some time to study about the CAVLC and CABAC in H.264.