Instructions: Answer the following questions in two to three sentences based on the provided source materials.

1. What is the primary technical objective of ITU-T Recommendation G.729 Annex C+?
2. Which specific speech coding algorithm and bit rate form the basis of Recommendation G.729?
3. What was the purpose of Corrigendum 1 (03/2001) issued for Annex C+, and did it affect the C-source code?
4. Identify the organization responsible for preparing Annex C+ and the procedure through which it was approved.
5. What new functionality was introduced in Annex C+ to enhance operation with Annex E?
6. List the three main constraints or goals that guided the development and integration work for Annex C+.
7. How does the integration of Annex D (DTX operation) differ from the integration of Annex E?
8. What are the two main C code programs provided for simulating the encoder and decoder, and what are their functions?
9. What is the role of the World Telecommunication Standardization Conference (WTSC) in the creation of ITU Recommendations?
10. In the context of the simulation software, what are the two options for the dtx_option parameter?