Discussion

The Story of
Big Solitude and Mostly Silent

-1 The problem of communication

-2 The Idea of Transmitting Data using Multiple Arrows

-3 The Source Coding Problem

-4 The error correction problem

-5 The idea of Charles Cody

See: Convolutional encoding.
See: Viterbi decoding.
See: Animated Viterbi decoder.

Listen how Jim Massey describes the true story of Andrew Viterbi's paper on what was later called the Viterbi Algorithm.
Jim Massey again. He describes the problem of the complexity of the Viterbi decoder.
Let's forgive Peter Massey, author of the fairy tale, this technical inaccuracy:
he uses an alphabet of 10 symbols and a convolutional encoder of 2 memory elements. In such case, the number of states of the encoder is 10 times 10 = 100, so the decoder of "Vivian Terby" needs a trellis of width 100. In Peter's story she only uses a state space of 10 instead of 100.

-6 The Problem of "always tired" Airy

See: fading channels

-7 How the "Disturbing Channel" spoiled the transmission

See: delay spread

-8 The Idea of Liza Equally

-9 The trick of Liza and Vivian

-10 Summary