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Questions tagged [lossless]

Lossless data compression is a class of data compression algorithms that allows the original data to be perfectly reconstructed from the compressed data.

Lossless data compression is a class of data compression algorithms that allows the original data to be perfectly reconstructed from the compressed data.

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Determining Apple AAC vs. Lossless format using something like Ruby MP4Info gem?

I'm trying to organized music for a radio station and have an iTunes library with a huge number of music files. The files are in various formats (Flac, MP3, AAC, etc.). I need to break all the files up by format. I have a simple Ruby script that…
JohnMetta
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Advantages and Disadvantages of Lossless compression?

Can someone please tell me the pros and cons of lossless compression?
user5546470
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Good audio playback library for playing .flac and other loss less formats in Swift?

I've tried https://github.com/ap4y/OrigamiEngine but I can't get it to play flac files. here's a sample var url = "/Users/Simun/Downloads/track.flac" url =…
Struki84
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Lossy OR Lossless Decomposition

Consider the relation R(A,B,C,D,E) with the set of F=(A->C,B->C,C->D,DC->C,CE->A) Suppose the relation has been Decomposed by the relations R1(A,D),R2(A,B),R3(B,E),R4(C,D,E),R5(A,E) Is this decomposition lossy or lossless? i tried solving this…
batman007
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How to joing to jpegs without loading them in memory

I've read something about jpeg Lossless editing, with it is possible to rotate, crop and a few other things without the need to really load the full image into memory, is there by any means a way of joining two jpegs together using this kind of…
leonardo albuquerque
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Determine if Lossless using TagLib

I'm working on a little project for my own personal use in VB.NET which relates to multimedia (audio and video) files. I've added TagLib to my project via NuGet, and am slowly finding ways to get the information from my files using it. One thing i…
Salem874
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What's the smallest(in size) image format which can encode xFFFFFF colors?

I'd like to know which is the image format which permits me to encode losslessly 0xFFFFFF colors, but I need the one which occupies less space on disk. I know that BMP, JPEG(variant), TIFF, PNG,(just to say some) are lossless, but which one is the…
Christian Pao.
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Lossless Image Compression - Image Recovery Fault

My prof. gave me two programs written in C: a lossless compression and a decompression one. I have to implement the Integer Wavelet Transform (I was using the lifting scheme of Haar's function but I changed to the Daubechies 5/3 int-to-int later) to…
Norle
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BCNF and 3NF: Normalization of Database Schema

When converting a schema to BCNF or 3NF form, are they guaranteed to be lossless i.e if a relational schema R, having a dependency violating the condition of BCNF or 3NF, is decomposed into R1 and R2 so that R1 and R2 are in BCNF or 3NF will R1 and…
vibi
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How to make sure we get a lossless image

I'm trying to write a code that gets an Image (PNG, JPG, BMP, ETC') crops and rotate the image. I want to crop the image without losing information (no change in interpolation) so i am using Bitmap target = new Bitmap(cropRect.Width,…
Sandman
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Lossless crop AVCHD and save back as AVCHD

I have many videos are record in AVCHD format by my SONY NEX6 camera. i want to crop those useless shots and save it back to AVCHD. It is because i don't want to convert to other video format which take up more space (Apple ProRes) than the…
user1172579
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Prediciting time or compression ratio for lossless compress of a file?

How would one be able to predict execution time and/or resulting compression ratio when compressing a file using a certain lossless compression algorithm? I am especially more concerned with local compression, since if you know time and compression…
22332112
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How to convert Lagarith .avi videos to MP4 using WinFF

I have a bunch of .avi videos encoded with Lagarith codec. We would like to convert them in to a lossless .MP4 format so that they could be easily played on html. I want to keep video specifications remain the same if it's possible and just convert…
Moein
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Windowing and lossless compression

I'm studying how FLAC works, although my question is valid for any lossless codec. I wonder how may a codec be lossless if the original signal is multiplied by a window which is not rectangular. I think this operation will modify the stream that we…
baister
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98kHz audio files on iPhone

So my question is pretty straight forward: can 98kHz audio files be played on iOS devices? If someone has a link on tech specs I would really appreciate it.
dariaa
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