Efficient coding of binary strings for low bit rate entropy audio coding

An apparatus, comprising at least one processor;

• and at least one memory including computer program code, said at least one memory and said computer program code configured to, with said at least one processor, cause said apparatus at least to:
• cause encoding of data to be stored or transmitted, wherein the data is encoded by causing the apparatus to:
• apply a function by the processor on a string stored in said memory in accordance with a rule of a set of rules, the string comprising first and second representatives, wherein the function ensures that the string comprises at least one of a predetermined representative at an end of the string after the function has been applied;
• provide, by the processor, a representation of the string, wherein said representation comprises at least one encoded representative stored in said memory, each of said at least one encoded representative being associated with at least one representative of the string,
• wherein said representation does not comprise an encoded representative being associated with at least one of the at least one predetermined representative at the end of the string.