Read the Code Table - Huffman Codes Use Shorter Names

Left and right edges become the bits in each symbol's code.

highlighted = computed this step

Edges become bit names

After the merges, each left edge contributes 0 and each right edge contributes 1.

\text{left}=0,\quad \text{right}=1

A is the most common symbol, and its code is 1.

A=1

B uses 00, C uses 010, and D uses 011.

B=00,C=010,D=011

No code is the prefix of another code, so the receiver can read the bitstream from left to right.

\text{prefix code}