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Questions and Answers
Which codec was selected as the mandatory default 3G speech codec by TSG-SA?
Which codec was selected as the mandatory default 3G speech codec by TSG-SA?
- MPEG-4 speech codec
- ITU G.729
- GSM AMR (correct)
- IS127 EVRC
What was a key reason for selecting the GSM AMR as the 3G speech codec?
What was a key reason for selecting the GSM AMR as the 3G speech codec?
- It offered multiple codec modes for flexibility in service quality. (correct)
- It provided the highest data rates.
- It was developed by ARIB specifically for this project.
- It was the only codec available at that time.
Which codec was found to exceed the performance requirements set by ARIB for the Mandatory Speech codec?
Which codec was found to exceed the performance requirements set by ARIB for the Mandatory Speech codec?
- IS127 EVRC
- MPEG-4 speech codec
- GSM EFR (correct)
- ITU G.729
What was one of the advantages of GSM AMR over the other candidate codecs?
What was one of the advantages of GSM AMR over the other candidate codecs?
In addition to GSM EFR, which other codec modes were part of GSM AMR's selection?
In addition to GSM EFR, which other codec modes were part of GSM AMR's selection?
When was the codec selection process completed according to the text?
When was the codec selection process completed according to the text?
What was the maximum theoretical peak rate for UTRAN Release'99?
What was the maximum theoretical peak rate for UTRAN Release'99?
Which code division multiple access scheme was chosen for UTRAN?
Which code division multiple access scheme was chosen for UTRAN?
What is the chip rate used in UTRAN?
What is the chip rate used in UTRAN?
What is the 'Carrier spacing' in UTRAN?
What is the 'Carrier spacing' in UTRAN?
How many source rates could the speech codec in UTRAN use?
How many source rates could the speech codec in UTRAN use?
Why was the occupied bandwidth in UTRAN set to less than 5 MHz?
Why was the occupied bandwidth in UTRAN set to less than 5 MHz?
What is the purpose of the 'Mandatory Speech Codec for Narrowband Telephony Service' feature?
What is the purpose of the 'Mandatory Speech Codec for Narrowband Telephony Service' feature?
What protocols are involved in the 'Mandatory Speech Codec for Narrowband Telephony Service' feature?
What protocols are involved in the 'Mandatory Speech Codec for Narrowband Telephony Service' feature?
Which aspect of UTRAN design is addressed by the 'Mandatory Speech Codec for Narrowband Telephony Service'?
Which aspect of UTRAN design is addressed by the 'Mandatory Speech Codec for Narrowband Telephony Service'?
What is the purpose of AMR in the context of speech coding in UTRAN?
What is the purpose of AMR in the context of speech coding in UTRAN?
Which document contains references to the 'Mandatory Speech Codec for Narrowband Telephony Service'?
Which document contains references to the 'Mandatory Speech Codec for Narrowband Telephony Service'?
What does PLMN stand for in the context of UTRAN design?
What does PLMN stand for in the context of UTRAN design?
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