| Extension | .qcp |
| Category | audio |
| Description | The Qualcomm PureVoice File, often called the QCP format, is an audio data file meticulously developed by Qualcomm. This format is commonly used for voice memos and ringtones on mobile phones. The QCP format is designed to produce exceptionally clear audio at low data rates, making it a suitable choice for voice recording software. It's a popular option for managing voice data while maintaining good audio quality on mobile devices. |
| Technical details | The QCP format is compatible with EVRC (Enhanced Variable Rate Codec) and QCELP (Qualcomm Code Excited Linear Prediction) codecs. The first improves voice quality at low data rates, while the second provides high-quality audio at moderate data rates. The QCP file's data rate adapts to the communication link quality, optimizing network use. These files can also contain metadata and multirate data, for storing data rate information and other encoding parameters. The QCP format is widely used for voice recordings and ringtones on mobile phones. QCP files can be played on various mobile devices and some computer programs that support the necessary codecs. Detailed information about the QCP format is available in RFC 3625, which describes the file format and MIME types for speech data. However, this standard might be too technical for some; "data processing rate" refers to the amount of data handled per unit of time, and "codecs" are software for encoding and decoding digital signals. The QCP format excels at providing crystal-clear audio at low data rates, making it ideal for voice recordings. |
