22.2 multichannel sound (22.2 ch sound) is currently broadcast using MPEG-4 Advanced Audio Coding (AAC) in 8K Super Hi-Vision broadcasting in Japan. The use of MPEG-4 AAC for contribution and distribution transmissions is also planned. Contribution and distribution transmissions require sufficient audio quality to withstand repeated coding and decoding processes. In this study the bit rate of MPEG-4 AAC for a 22.2 ch sound signal satisfying tandem transmission quality was investigated by the subjective evaluation specified in Recommendation ITU-R BS.1116-3. The basic audio quality of 72 stimuli made from a combination of 6 bit rates, 3 different numbers of tandems, and 4 contents were evaluated by 28 listeners. The required bit rates of 22.2 sound material transmission for 3, 5, and 7 tandems were concluded to be 96, 144, and 160 kbit/s per channel, respectively.
Authors:
Kitajima, Shu; Sugimoto, Takehiro; Oode, Satoshi; Komori, Tomoyasu; Urano, Joji
Affiliations:
NHK Science & Technology Research Laboratories, Tokyo, Japan; Japan Television Network Corporation, Tokyo, Japan(See document for exact affiliation information.)
AES Convention:
145 (October 2018)
Paper Number:
10078
Publication Date:
October 7, 2018
Subject:
Spatial Audio-Part 1
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.