Context: ASPEC was the joint proposal of AT&T Bell Laboratories, Thomson Consumer Electronics, Fraunhofer Society and CNET. It provided the highest coding efficiency.

Question: What was the name given to the proposal?
Answer: ASPEC

Question: What did the joint proposal provide?
Answer: the highest coding efficiency

Question: Other than Thomson Consumer Electronics, Fraunhofer Society and CNET, who else was a part of the joint proposal?
Answer: AT&T Bell Laboratories