CAVS to IMA Converter

Pull the soundtrack from CAVS videos into IMA format

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Audio Extraction

The converter pulls the audio track from CAVS and delivers a clean IMA file — stripping away the video data you do not need.

Private and Secure

Uploaded files are deleted right after processing, and converted results are removed within 24 hours. Your content stays protected.

Any Device Works

Desktop, laptop, tablet, or smartphone — the converter adapts to your screen and works in any modern web browser.

How to convert CAVS to IMA

1

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

2

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

3

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

About formats

CAVS (Chinese Audio Video Standard) is a video compression standard developed by the Audio Video Coding Standard Workgroup of China and adopted as a national standard (GB/T 20090.2) in February 2006. The project began in 2002 with the aim of creating an independent compression technology that could serve the massive broadcasting and multimedia infrastructure in China without relying on foreign-licensed codecs. CAVS, also referred to as AVS1, achieves compression efficiency comparable to H.264/AVC while utilizing a simpler patent framework with significantly lower licensing costs. The standard supports video resolutions from standard definition up to high definition, making it suitable for both terrestrial digital television broadcasting and broadband streaming. Key technical features include 8x8 block transforms, multiple prediction modes, and a loop filter designed to reduce blocking artifacts at low bit rates. The Chinese government endorsed CAVS as the mandatory compression standard for the national digital TV broadcasting system, ensuring broad deployment across set-top boxes and television receivers in the country. While CAVS has limited international adoption compared to H.264 or HEVC, its significance lies in serving one of the largest media markets in the world and demonstrating a viable national alternative to globally dominant video coding standards.
Initial release: February 2006
IMA ADPCM (Adaptive Differential Pulse-Code Modulation) is a compact audio coding standard published by the Interactive Multimedia Association in 1992, addressing the need for a lightweight, royalty-free compression scheme suitable for early multimedia PCs and embedded devices. The algorithm encodes each sample as a 4-bit nibble representing the quantized difference from the previous sample, while an adaptive step-size table adjusts dynamically to track signal amplitude — delivering a fixed 4:1 compression ratio over 16-bit PCM. Decoding requires only an integer multiply-add per sample and a small lookup table, so even modest 1990s CPUs could decompress in real time without dedicated DSP. The format became deeply embedded in the multimedia landscape: Microsoft adopted it as a standard ACM codec for WAV files, game engines relied on it for sound effects, and telephony equipment used it for voice storage. Its advantages are enduring: predictable 4:1 size reduction simplifies buffer allocation in constrained environments, the decode path runs on 8-bit microcontrollers, and the open specification made IMA ADPCM one of the most broadly implemented audio codecs in computing history.
Initial release: 1992

Frequently Asked Questions

What is the benefit of converting CAVS to IMA?

If you only need the audio from a CAVS recording, converting to IMA strips the video and produces a lightweight audio file.

What program opens IMA files?

Audio editors, game engines, and multimedia applications handle IMA ADPCM audio.

Can I convert several files at once?

Yes. Upload multiple CAVS files and extract IMA audio from each one in a single batch operation — fast and convenient.

Do I need to install anything?

Not at all. The converter runs in your web browser — no downloads, plugins, or desktop applications are required for the conversion.

Does it work on phones and tablets?

Yes. The converter runs in any modern mobile browser on iOS and Android devices, with the same functionality as desktop.

What happens to my uploaded files?

Uploaded CAVS files are deleted from our servers immediately after processing. Converted IMA files are auto-removed within 24 hours.