Types of digital files for audio Transcription

There are several recording systems are available, suitable for dictation recording of the conference. If you already have a digital recording mechanism is a good chance to integrate a wide range of file types for different purposes. This article aims to discuss the different types and suggest the right one for you depending on the situation. If we continue to believe that a digital recording device to buy, you get the chance toconsider the types of files that will produce before buying.

If you do not know which file you're working, you can see by looking at the file extension. This is the set of three letters after the point, as in, for example, maintenance. Wav "

The different types of files have all the advantages and disadvantages of transcription services, the most obvious, there is a trade-off between quality and file size. Audio files can be very, very big, since they are not compressed, butcompression "lossy", ie a complete or "lossless", the audio was captured and compressed to remove data that may be considered redundant, thus diminishing the quality of sound, which can cause problems for Transcriber.

It may initially seem obvious that you and your transcriptionist the best quality, but actually very lossy formats have a quality loss is negligible, but the files are much smaller. If you plan to us through e-file your transcription transcriptionist;The advantage of a 2MB file, as opposed to 40MB in size, is ready! No audio of any length is small, but at least you can file for an e-mail to 2MB of print. Most providers do not permit a 50MB file through and even if he did would take hours to download, including both your email and your transcriptionist's. Transcriptionists increasingly using a system that bypasses e-mail, you can upload files or directly to their website, or send the filesusing a simple file transfer program. But even these options are limited to certain sizes in general.

It is also interesting to note that, depending on the playback software used to print, transcriptionist may be able to return to perform certain types of files. Some covers virtually all types of digital files, while others are more limited, so you should check first.

The 'real file type' and attributes for you and your transcriptionist will also depend on whatThe purpose of the study. If it is a dictate a lower quality sound and will still have a sufficiently clear framework for a digital transcription.

If a study focus groups, for example, how many people sitting at different distances from the recorder and speaker at various levels and positions, you will probably need a higher audio quality needed to satisfy them.

The recorder may allow you to have different properties for the same file type settings. Itcan make a big difference in sound quality and file size, and thus the quality of transcription. In some cases (such as dictation of a person talking in the car, in a quiet environment), probably can not afford the registration of good quality will solve even more evident for transcription. In other cases (focus groups, noisy environment) you can find what you need to choose a size slightly larger file to maintain a good quality sound.

Properties are oftenshown as 8000 Hz kHz mono suitable for dictation and the area extending up to 44.100 kHz, stereo, which is the highest quality, used for music CDs.

Examples of different size and some details about its use in the following note:

Waveform Audio (. Wav)

Waveform Audio (. Wav) is a general format of the file and was one of the first types of audio files are designed for use with your computer. It's lossless, but is generally very high. This means that you will probably need to send fileson a CD instead of sending an email to them, even if some transcriptionists, including myself, on my website http://www.penguin-transcription.co.uk have a system where you can receive large files over the Internet without using email. You definitely need a broadband connection, or the like, to use effectively al.
Warning! Not all the wav files are the same! Even if all finals. Wav, depending on the recorder, you and your Renders may need a special codec "to play again. An example isSanyo, a popular system for recording and relatively inexpensive, but one that detects Sanyo wav file. You should check the transcriptionist and the ability to transcribe from Sanyo Wavs. Otherwise, it may force Sanyo sending the appropriate codec on the CD, if you ask them nice!

The following are all the losses, but in general the change in sound quality is negligible, and will save you time and money with a limited time of transmission. This is not a complete list of all audiotypes that are a huge number. It aims to cover most types detected by the software available for transcription.

MPEG-1 Audio Layer 3 (. Mp3)

This is a compressed WAV file, often used in music. Many writers will also be possible to record digital dictation allows you to record MP3 or WAV and then compress to MP3 to send to the transcript. Compressed files are about one-twelfth the size of a WAV file.

Windows Media Audio (. WMA)

Windows Media Audio(. WMA), Windows Media Player developed, which is packed with all Windows-based PCs in those days. This is even more compressed MP3, that about thirty sixth the size of n. Wav, but it seems to preserve the original quality of sound. I must say that my experience with the transfer, I'm not sure if he was still the case.

Digital Speech Standard (. Site N)

In my experience, the playback software most used for transcription play. A file website. Otherwise There is a free download available at Olympus. I think not. Our site is Olympus, and almost all developed, but not all, there are recorders Olympus. A file website. Lanier and Grundig recorders also in common use. Site. The file size is reduced from twelve to twenty times, compared with a WAV file, and is ideal for printing, because it is small and easy to e-mail.

DVF

This is the answer to Sony. A file web page. This is a very highly compressed files, but good for> Voice, and its small size makes it very easy to send e-mail.

Encrypted dictation (. DCT)

Often used in medical transcription, which requires a very high confidence, these recordings are encrypted with the end of registration and must be decrypted by the receiver the transcriber. A wide range of playback software to manage these files.

TrueSpeech from DSP Group

TrueSpeech from DSP Group, has for personal computers and custom designcommunication devices. Has a very high compression ratio ranging from 15:1 to 27:1. If you are able to incorporate this format is probably more limited for use with dictation or one-to-one in a quiet environment. It 'probably a loss of focus groups, etc.

There are a number of other types are available, so do not worry if the machine type is produced, not mentioned above. Contact the VA and he / she will probably be able to help you, or at least is the point ofright direction.

CD audio (. CDA)

These files are standard recordings on CD and is generally the file type of music files purchased from a CD. As I understand it (not too good!) CDA is basically a file type of insurance that says that this is a file on a CD, and the stock of the fund is probably a file or a second wave of these types of files listed. Most recorders record to CDA transcription, but if you're a professional recording of a lectureseries of lessons, for example, you may well be the CDA file. Most transcription software work with the CDA format. There are several ways to convert CDA files, but can be expensive and / or time. Transcriptionists who specialize in digital transcription is likely to be able to transcribe these files, but you may be charged an additional cost, when to turn it into a usable format. There are a number of converters available, but one,I have used successfully, and provides a trial version, Easy CD Ripper, a shareware program with a fully functional trial version from various places, including http://www.tucows.com/preview/209478 can be downloaded

You are probably only a limited number of file types available for your transcript, depending on your equipment, but all equipment should give you some options, depending on your needs. If you have a chance, it's always a good ideamake a trial recording with the statements that you believe would be fair. Then play it again or send to your transcriptionist to return to play in order to verify that the sound quality is acceptable.

Finally, let me just say that this information is based on my experience and knowledge of digital transcription. I can not fully guarantee its accuracy, but it would be very interested to make mistakes and happy to hear, to correct it. Even if you feel that aimportant area, I have not covered, let me know and I will do my best to keep.

Types of digital files for audio Transcription

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