![]() Thomson, which has partnered with Fraunhofer IIS since the codec's launch in 1992, is adding Fraunhofer Institute's new mp3 SURROUND technology to its licensing program. The web site now provides users immediate download access to free mp3 SURROUND evaluation software, demo samples and detailed technology information. At the same time, the new format offers complete backward compatibility to any existing mp3 software and hardware devices.Īttracting attention at several recent industry events, the new mp3 SURROUND format has become eagerly anticipated by the vast mp3 user community. Mp3 SURROUND supports high-quality multi-channel sound at bit rates comparable to those currently used to encode stereo mp3 material, resulting in files half the size of common compressed surround formats. This technology will enable 5.1 channels surround-quality sound for a broad spectrum of applications including web-based music distribution, broadcasting systems, PC-related audiovisual or gaming applications, consumer electronics and automotive systems. Fraunhofer Institute for Integrated Circuits IIS, inventors of mp3, together with Thomson, co-inventors of mp3 and exclusive licensing representative for their mp3 patents and software, and Agere Systems (NYSE:AGR.A) (NYSE:AGR.B), have joined to launch mp3 SURROUND into the consumer and commercial markets. 2, 2004 - Thomson (Euronext Paris:18453) (NYSE:TMS) today announced that mp3, the world's most popular audio compression format, goes multi-channel. They are above 5th grade on the scale showing certain quality headroom of such devices.PARIS - Dec. Ratings of such devices are calculated analytically taking into account both the grades received and the amplification applied. ![]() Ruler for convenient estimation of "highs" and "lows".įor devices with small impairments (not audible in ordinary listening tests) SoundExpert amplifies their sound artifacts to some predefined extent. Accuracy depends on number of grades returned by participants. It is also indicated by the color of bar - more accurate ratings have darker bars and less percentage values. The lowest local rating is more important in this sense as it indicates worst case behavior of tested device. ![]() It varies with type of sound material: music of different genres and complexity, voice with or without music, noisy/clear recordings etc. Big gap between them means that sound quality of device/technology is not consistent enough. The highest and the lowest ones are indicated. In fact, the actual rating is an average of those nine local ratings. As each device is tested with nine different sound samples, there are nine different local ratings for a device. In most cases using this device/technology:ġ.0 – you will hear heavily distorted soundĢ.0 – you will hear unpleasant sound artifactsģ.0 – you will hear distinctly audible but tolerable sound artifactsĤ.0 – you will hear faintly discernible sound artifactsĥ.0 – you will not hear any sound artifactsĪbove 5.0 – all sound artifacts will be beyond threshold of human perception with corresponding perception marginĪnd - "low" and "high" of rating. Anchor points could be interpreted as follows: Value of actual perceived audio quality (rating) which is also indicatedīy the bar length. The rating bar consists of the following elements: Vorbis (Xiph 1.3.3) - Ogg Vorbis, 256.4 kbit/s FBR Mp3 (Audition 1.5) - MPEG-1 Layer 3 CBR, 256.1 kbit/s FBRĬODER: MP3/mp3PRO(R) Encoder for Adobe Audition 1.5 ![]() Use Variable Bit Rate Encoding (VBR): YesĪac iTunes Plus 2012 - MPEG-4 AAC VBR Low Complexity, 265.1 kbit/s FBRĬODER: afconvert from Mac OS X 10.7.3 (11D50b) 64bit, 2012/04ĭECODER: afconvert from Mac OS X 10.7.3 (11D50b) 64bit, 2012/04ĪTRAC3plus (Hi-SP) - ATRAC3plus (used in Hi-MD and Sony's solid-state and CD walkman products), 256.9 kbit/s FBR Use Variable Bit Rate Encoding (VBR): NoĪAC (iTunes 7.5) - MPEG-4 AAC CBR Low Complexity, 250.3 kbit/s FBRĪAC (iTunes 7.6) - MPEG-4 AAC VBR Low Complexity, 264.6 kbit/s FBR AAC (iTunes 7.1) - MPEG-4 AAC CBR Low Complexity, 257.4 kbit/s FBR ![]()
0 Comments
Leave a Reply. |