Features
 
  Code rate : 1/2, 1/3, 1/4 (constraint length K=9)
  Encoder Generator Polynomial:
 
Rate   K   G0   G1   G2   G3
1 / 2 9 753(8) 561(8)
1 / 3 9 557(8) 663(8) 711(8)
1 / 4 9 765(8) 671(8) 513(8) 473(8)
  Datarate : up to 1Mbps
  Decoding Mode : continuous or Frame
  BER : 10-3 for voice, 10-5 for data
  4-bit soft-decision
  Applicable to 3GPP TrCH CODEC
 
   

 
Logic Block Diagram
 
Viterbi Decoder Core consists of Branch Metric Block, ACS(Add-Compare-Select) Block, ACS/TB (Trace-Back) memory, and control logic blocks.