Convert ADTS to AMR

Total Audio MP3 Converter converts ADTS files to AMR format. The software is an all in one audio converter that supports more than 90 audio and video files as input, and converts to popular formats such as MP3, WAV, AAC, M4A, OGG, WMA, and AMR.

Total Audio MP3 Converter also supports batch conversion, and is full compatible with Vista and Windows 7.

1. Free Download Total Audio MP3 Converter here and then install the software by instructions
2. Launch Total Audio MP3 Converter
3. Choose ADTS Files


Click "Add Files" to choose ADTS files and then add them to conversion list.


Choose one or more ADTS files you want to convert and then click Open.


4. Choose "to AMR"




5. Convert ADTS to AMR


Click button "Convert" to convert ADTS files to AMR format.


The software is converting ADTS files to AMR format.


6. Play and Browse AMR File


When conversion completes, you could right-click converted AMR file and choose "Play Destination" to play the outputted AMR file; or choose "Browse Destination Folder" to open Windows Explorer to browse the AMR file.

Free Download Total Audio MP3 Converter

What is ADTS?
ADTS stands for Audio Data Transport Stream. ADTS is a container for AAC encoded audio. It consists of a series of frames, each frame having a header followed by the AAC audio data. The formats are defined in MPEG-2 Part 7, but are only considered informative by MPEG-4.

AAC compressed audio data may be stored in either an MPEG-4 container file format (.mp4, .m4a) or more basic MPEG-2 based file formats such as a ADTS (.aac, .adts) Audio Data Transport Stream file.

An MPEG-4 file contains a header that includes meta-data followed by "tracks" which can include video as well as audio data, for example, H.264 encoded Video and AAC encoded Audio.

ADTS in contrast is a streaming format consisting of a series of frames, each frame having a header followed by the AAC data.

Therefore, a decoder can start playing a ADTS stream at any point within that stream making it ideal for "radio" like applications. To decode an MPEG-4 file however, the file header must first be read in order to properly playback the file.

What is AMR?
Adaptive Multi-Rate (AMR) is an audio data compression scheme optimized for speech coding. AMR was adopted as the standard speech codec by 3GPP in October 1998 and is now widely used in GSM and UMTS. It uses link adaptation to select from one of eight different bit rates based on link conditions. AMR is also a file format for storing spoken audio using the AMR codec. Many modern mobile telephone handsets will allow you to store short recordings in the AMR format. There also exists another storage format for AMR that is suitable for applications with more advanced demands on the storage format, like random access or synchronization with video. This format is the 3GPP-specified 3GP container format based on ISO base media file format.

Key Features:

• Sampling frequency 8 kHz/13-bit (160 samples for 20 ms frames), filtered to 200-3400 Hz.
• The AMR codec uses eight source codecs with bit-rates of 12.2, 10.2, 7.95, 7.40, 6.70, 5.90, 5.15 and 4.75 kbit/s.
• Generates frame length of 95, 103, 118, 134, 148, 159, 204, or 244 bits for bit rates 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.2, or 12.2 kbit/s, respectively
• AMR utilizes Discontinuous Transmission (DTX), with Voice Activity Detection (VAD) and Comfort Noise Generation (CNG) to reduce bandwidth usage during silence periods
• Algorithmic delay is 20 ms per frame. For bit-rates of 12.2, there is no 'algorithm' look-ahead delay. For other rates, look-ahead delay is 5 ms. Note that there is 5 ms 'dummy' look-ahead delay, to allow seamless frame-wise mode switching with the rest of rates.
• AMR is a hybrid speech coder which uses Algebraic Code Excited Linear Prediction (ACELP)
• The complexity of the algorithm is rated at 5, using a relative scale where G.711 is 1 and G.729a is 15.
• PSQM testing under ideal conditions yields Mean Opinion Scores of 4.14 for AMR (12.2 kbit/s), compared to 4.45 for G.711 (u-law)
• PSQM testing under network stress yields Mean Opinion Scores of 3.79 for AMR (12.2 kbit/s), compared to 4.13 for G.711 (u-law)

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