M2TS to CVSD Converter

Extract CVSD delta-modulated audio from M2TS video

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Robust Voice Encoding

CVSD is built for noisy transmission channels. Extract M2TS dialogue in a format designed for military and telecom use.

Cloud Processing

Audio extraction runs on our servers. Your device stays responsive while M2TS audio is encoded to CVSD.

Fast Results

Audio-only extraction avoids video processing. CVSD files from M2TS are generated quickly.

How to convert M2TS to CVSD

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose cvsd or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your cvsd file right afterwards

About formats

M2TS (MPEG-2 Transport Stream) is a container format used primarily for multiplexing audio, video, and other data on Blu-ray Disc media. The format is specified as part of the Blu-ray Disc Audio-Video (BDAV) standard developed by the Blu-ray Disc Association, with commercial Blu-ray products launching in 2006. M2TS files wrap content in MPEG-2 transport stream packets with an additional 4-byte timestamp header prepended to each 188-byte packet, resulting in 192-byte packets that enable more precise timing and error recovery during optical disc playback. This extended packet structure helps maintain synchronization when dealing with the variable read speeds inherent to disc-based media. M2TS supports the major Blu-ray video codecs including H.264/AVC, MPEG-2, and VC-1, alongside audio formats such as Dolby TrueHD, DTS-HD Master Audio, and LPCM for lossless surround sound. The container is also used by AVCHD camcorders for recording high-definition footage, making it common in both consumer disc playback and video production workflows. M2TS files preserve chapter markers, subtitle streams, and interactive menu data within the transport stream. Reliable synchronization mechanisms and support for high-quality codecs make M2TS well-suited for archiving high-definition content where preserving full source quality is essential.
Initial release: 2006
CVSD (Continuously Variable Slope Delta modulation) is a voice digitization method standardized for military and telephony use by NATO and the CCITT during the 1970s. It encodes differences between consecutive samples as a single bit — 1 if the current sample exceeds the prediction, 0 otherwise — while a syllabic companding filter adjusts step size by monitoring runs of identical bits. Operating at 16 to 64 kbps, CVSD balances voice intelligibility against bandwidth, making it the encoding of choice for secure military links and tactical radio systems. The bitstream can be decoded with straightforward hardware, originally built into dedicated integrated circuits. One advantage is implementation simplicity — encoders and decoders need minimal resources, enabling real-time processing on low-power embedded hardware. Robustness under noisy conditions is another strength, as single-bit errors affect only local samples rather than corrupting entire frames. SoX provides software encoding and decoding support, letting modern systems work with legacy CVSD recordings from military archives and vintage telecommunications infrastructure.
Developer: CCITT / NATO
Initial release: 1970

Frequently Asked Questions

Why convert M2TS to CVSD?

CVSD is used in military and telecom voice systems. It encodes speech robustly with good noise tolerance for radio transmission.

What is the difference between CVS and CVSD?

Both use Continuously Variable Slope Delta modulation. CVSD is the unfiltered variant, while CVS applies filtering to the output.

What opens CVSD files?

SOX audio toolkit and specialized telecom applications can read and process CVSD audio data for voice analysis.

Is CVSD used today?

CVSD remains in use in some military radio and Bluetooth audio applications where robustness matters more than fidelity.

Can I batch-convert?

Upload multiple M2TS files and extract CVSD audio from each in one batch for efficient processing.