Qrs

This situation of streaming QR code data transmission is similar to the "Binary Erasure Channel (BEC)," which is a communication model. In this model, the sender transmits binary data (0 or 1), and the receiver has a certain probability of not receiving some data bits, which are marked as "erased" or "lost." In other words, the receiver knows which bits are lost but does not know their specific values. This model is used to study and design coding techniques that can effectively transmit information even in cases of data loss. Scientists have already achieved very mature research results on how to efficiently transmit data in BEC, one of which is using "Fountain Codes." Fountain Codes are a type of error-correcting code that can effectively transmit information even in the case of data loss. This project uses Luby Transform coding, which is a type of Fountain Code. The basic principle is to divide the original data into multiple small blocks and then generate an unlimited number of encoded blocks through encoding. The receiver only needs to receive enough encoded blocks (usually slightly more than the original blocks) to reconstruct the original data. After selecting a file on the Send page, expand Save QR sequence as GIF. Choose a multiple of the data block count (1.5× by default) or an exact frame count, then set the playback speed and image size and select Export GIF. Frame counts are not capped. Larger sequences take longer to encode and use more memory. You can cancel an export while it is running. Qrs is the open-source project qifi-dev/qrs (https://github.com/qifi-dev/qrs) by qifi-dev, released under MIT. Ion packages it unmodified from commit f3584e59d981, adding only a manifest, an icon and a storage compatibility script.

Written by qifi-dev, published to Oikou by Ben Grande.

• ★ 1,697 stars on GitHub
• Licence: MIT
• Built from commit f3584e59d981

View the repository on GitHub

Not rated. Nobody has said who this app is suitable for, so Personal Clouds and the Oikou app treat it as 18+.

Internet

It asks to reach these hosts, and no others:

• fonts.gstatic.com

Personal Cloud tools

None. It uses nothing from your Personal Cloud beyond its own storage.

Notifications

It does not send push notifications.

Storage

Up to 16 MB on your Personal Cloud.

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