DRC to AAC
Convert DRC to AAC, DRC to AAC Converter
DRC to AAC Converter converts DRC to AAC. The converter is an ALL-IN-ONE audio converter that supports more than 90 audio and video file formats.
DRC to AAC Converter supports batch conversion and is full compatible with Vista and Windows 7.
Click "Add Files" button to choose DRC files and add them to conversion list.
Choose one or more DRC files you want to convert and then click Open.
Click "Convert" to convert DRC files to AAC format.
The software is converting DRC files to AAC format.
When conversion completes, you could right-click converted file and choose "Play Destination" to play the AAC file; or choose "Browse Destination Folder" to open Windows Explorer to browse the outputted AAC file.
What is DRC?
The specification was finalised on 21 January 2008, and further developments will only be bug fixes and constraints. In September of that year version 1.0.0 of the reference implementation was released which corresponds to an intra-frame only subset known as Dirac Pro, which has been proposed to the SMPTE for standardisation as VC-2. Version 2.2.3 of the full Dirac specification, including motion compensation and inter-frame coding, was issued a few days later. Dirac Pro was used internally by the BBC to transmit HDTV pictures at the Beijing Olympics in 2008.
The format implementations are named in honour of the theoretical physicists Paul Dirac and Erwin Schrodinger, who shared the 1933 Nobel Prize in physics.
Dirac supports resolutions up to HDTV (1920x1080) and greater and is claimed to provide significant savings in data rate and improvements in quality over video compression formats such as MPEG-2 Part 2, MPEG-4 Part 2 and its competitors, e.g. Theora, and WMV. Dirac's implementers make the preliminary claim of "a two-fold reduction in bit rate over MPEG-2 for high definition video", which makes it comparable to the latest generation standards such as H.264/MPEG-4 AVC and VC-1.
Dirac supports both constant bit rate and variable bit rate operation. When the low delay syntax is used, the bit rate will be constant for each area (Dirac slice) in a picture to ensure constant latency. Dirac supports lossy and lossless compression modes.
Dirac employs wavelet compression, instead of the discrete cosine transforms used in most older compression formats. Dirac is one of several projects attempting to apply wavelets to video compression. Others include Rududu, Snow, RedCode and Tarkin. Wavelet compression is also used in the JPEG 2000 and PGF compression standards for photographic images.
Dirac can be used in various container formats (e.g., AVI, Ogg, MKV). It was registered for the use in container formats based on the ISO base media file format (MPEG-4 Part 12; e.g., MP4). It was also registered for use in MPEG-2 transport stream.
What is AAC?
AAC has been standardized by ISO and IEC, as part of the MPEG-2 & MPEG-4 specifications. The MPEG-2 standard contains several audio coding methods, including the MP3 coding scheme. AAC is able to include 48 full-bandwidth (up to 96 kHz) audio channels in one stream plus 15 low frequency enhancement (LFE, limited to 120 Hz) channels and up to 15 data streams. AAC is able to achieve indistinguishable audio quality at data rates of 320 kbit/s (64kbit/s/channel) for five channels. The quality is close to CD also at 96 kbit/s (48kbit/s/channel) for stereo.
AAC's best known use is as the default audio format of Apple's iPhone, iPod, iTunes, and the format used for all iTunes Store audio (with extensions for proprietary digital rights management).
AAC is also the standard audio format for Sony's PlayStation 3 and is supported by Sony's Playstation Portable, latest generation of Sony Walkman, Sony Ericsson Walkman Phone, Nintendo's Wii (with the Photo Channel 1.1 update installed for Wii consoles purchased before late 2007) and the MPEG-4 video standard. HE-AAC is part of digital radio standards like DAB+ and Digital Radio Mondiale.
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