Question 1/XV - Characteristics of equipment for the digital
transmission of sound programme signals (Continuation of Question 2/XV
1985-88)

Considering

(1) that conversion may be required between the two coding standards
given in Recommendation J.41;

(2) that conversion may be required between the coding standards given
in Recommendations J.41 and J.43;

(3) that synchronization problems associated with the digital
transmission of sound-programme signals in the international
plesiochronous network may have been identified;

(4) that CMTT are continuing their studies on coding methods for sound-
programme channels at rates above and below 384 kbit/s,

1. What modifications are required in existing Recommendations J.41,
J.42, J.43 and J.44?

2. What new Recommendations are required for digital sound programme
transmission?

Points for study

1. Conversion between the two coding standards given in Recommendation
J.41.

2.Conversion between the coding standards given in Recommendations J.41
and J.43.

3.Characteristics of equipment for the coding of analogue sound signals
at bit rates other than 384 kbit/s.

4. Harmonization of CCITT Recommendations with those of CMTT.

Notes

1. CMTT is responsible for recommending standards for the digital
encoding of sound-programme signals and account should be taken of their
work in this area.

2. Study Group XVIII are responsible for general network issues and
should be kept informed of any likely network implications arising from
the study of this Question, including coding standards originating in
CMTT.