Dct
From AudioLexic
DCT is a variable codec audio format designed for dictation by NCH Swift Sound. It has dictation header information and can be encrypted (often required by medical confidentiality laws). The standard dct player is the Express Scribe Transcription Player by NCH Swift Sound.
[edit] Codecs Supported
The list of codecs supported in dct files.
This is a reference to compare the audio quality and compression bitrates of the different wave compression codecs available for ".wav" and ".dct" files using the audio compression manager including PCM, GSM, ADPCM, CELP, SBC, TrueSpeech and MPEG Layer-3. Note: The Audio Compression Manager (ACM) is used for recording to .dct (dictation) files and/or .wav files.
| Format | Bitrate | 1 Min = | Sample |
|---|---|---|---|
| 11,025Hz 16bit PCM | 176.4kbs | 1292k | 11kbitpcm.wav |
| 8000Hz 16bit PCM | 128kbs | 937.5k | 8k16bitpcm.wav |
| 11,025Hz 8bit PCM | 88.2kbs | 646k | 11k8bitpcm.wav |
| 11,025Hz u-Law | 88.2kbs | 646k | 11kulaw.wav |
| 8,000Hz 8bit PCM | 64kbs | 468.8k | 8k8bitpcm.wav |
| 8,000Hz u-Law | 64kbs | 468.8k | 8kulaw.wav |
| 11,025Hz 4bit ADPCM | 44.1kbs | 323k | 11kadpcm.wav |
| 8000Hz 4bit ADPCM | 32kbs | 234.4k | 8kadpcm.wav |
| 11,025Hz GSM6.10 | 18kbs | 131.8k | 11kgsm.wav |
| 8000Hz Mp3 16k | 16kbs | 117k | 8kmp316.wav |
| 8,000Hz GSM6.10 | 13kbs | 102.5k | 8kgsm.wav |
| 8000Hz Lernout & Hauspie SBC 12k | 12.0kbs | 87.9k | 8ksbc12.wav |
| 8,000Hz DSP Group Truespeech | 9kbs | 65.9k | 8ktruespeech.wav |
| 8000Hz Mp3 8k | 8kbs | 60k | 8kmp38.wav |
| 8,000Hz Lernout & Hauspie CELP | 4.8kbs | 35k | 8kcelp.wav |
[edit] Comments
The above are wave files - even if they have the mp3 codec they will have the ".wav" or ".dct" extension.