Corrigendum 1 to Recommendation ITU‑T G.729.1 contains the details of several problems that have been identified recently in the C-code of the main body of Recommendation ITU-T G.729.1, and of its Annexes B, C and D. Corrigendum 1 does not introduce any changes to the text description of ITU‑T G.729.1 (including Annexes A, B, C and D).

Corrigendum 1 revises the source code to Release 1.5, which is found in the electronic attachment. The attachment incorporates the ANSI C source code for the main body of ITU-T G.729.1, Annex B, Annex C and Annex D (including updated test vectors for Annex C) and all approved corrections till 29 September 2009.