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The difference between lossy and lossless Part 2

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The difference between lossy and lossless Part 2

What is the difference between lossless and lossy music? Spectral comparison of lossy and lossless compression

Let’s not talk about the difference between the two music formats, let’s talk about the intuitive feel. For example, when you are in KTV, you always click various kinds of music to sing. What is the difference between lossless music and lossy music? Lossy Compression and Lossy Music Spectral Comparison of Lossless Compression

Is WAV a lossy or lossless format? – to understand

Is WAV a lossy or lossless format? 159***1368 WAV is a lossless format, with a maximum bitrate of 1.4M at 44100Hz. I hope to take likes and comments to report that Chocopa is good and WAV love is bad.

What is the difference between lossless and lossy compressed music?

At present, what online home music can really achieve lossless? What is the difference between lossless and lossless listening to online music platforms? Can ordinary people perceive that there is no loss…

What is the difference between lossy compression and lossless compression?

Differences: 1. Lossless compression can be fully restored, lossy compression cannot be the same as the original file after restoration, and there is a certain loss. 2. The compression ratio of lossless compression is generally from “2:1” to “5:1”, while the compression ratio of lossy compression

Know: Lossless and Lossy

It is said that the difference between lossy limit and lossless is obvious when listening to a classic or big weave… But unfortunately… I listen to less classic, don’t be intimidated… Then mention the tears of the times in my mind wma format …now

According to the difference between the images before and after compression, they can be divided into: lossless encoding and lossy encoding.

According to the difference between the images before and after compression, they can be divided into: lossless encoding and lossy encoding. A. Huffman coding B. Run-length coding C. Arithmetic coding D. Predictive coding Popular test College entrance exam First-tier constructor

Does anyone have a rigorous comparison between lossy and lossless image quality? -α|Sony/KM/M SLR/DSLM

Most of the difference between lossy and lossless is not seen in the static images, but in the latitude of the post adjustment. The difference between RAW and jpeg is like the difference between a book and a piece of paper. Lossy compression is sometimes just

The main difference between lossless predictive coding system and lossy predictive coding system is ( ). – Go to school

The main difference between lossless predictive coding system and lossy predictive coding system is ( ). A. The lossless predictive coding system has more quantizer parts than the lossy predictive coding system B. The lossy predictive coding system has more quantizer parts than the lossless predictive coding system

Difference Between Lossless and Lossy Music

1. Lossless music WMP can only play WAVE, if it is APE, please convert it to WAVE first. Qianqianjing can listen to any music format, recommended~~~ 2. The difference between lossless music and lossy music is hard to tell. Because there is also loss

[Double Blind Test] Can you hear the difference between lossy and lossless?

As an academic HiFier, I want to know how big is the difference between lossy and lossless. Feel free to follow the vote. Now I don’t know if the loss is A or B. I named it after a friend of mine to pass the double blind test.

Comparison of lossless and lossy image compression

Lossy Compression vs. Lossless Compression A Closer Look at Various Image Formats In general, there are two different types of image formats: lossy compression and lossless compression. 1. Lossy Compression Lossy compression can reduce images in memory and on disk

What is the difference between lossy and lossless music in game music?

Many friends will ask, some lossy and lossless music sounds no different to me. This is because human hearing is limited, generally 20 Hz to 20 kHz, and the sampling rate of game music production will use 44.1 KHz or 48 KHz.

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The difference between lossy and lossless

What is the difference between lossy and lossless?

What is the difference between lossy and lossless?:1 Contents Introduction Lossy and lossless sampling frequency and rate PCM encoding MP3 encoding MPC encoding WMA format APE format 4 Characteristics of MP3MPCmp3PRO APE5 sound format?

Briefly describe the difference between lossy compression and lossless compression. _Examination information network

Briefly describe the difference between lossy compression and lossless compression. Click to see the answers and enter the question bank to practice questions that may interest you. Questions that may interest you. 1 Briefly describe the reasons for image compression. Click to see the answer to enter the question bank Exercise 2 illustrates the bitmap and

Sound is also divided into unique recognition of the advantages and disadvantages of various lossy and lossless audio formats.

Features: The sound quality is average, the compression rate is relatively high, it is compatible with a large number of software and hardware, and it is widely used. It is definitely the current mainstream. OGG encoding Ogg is an advanced lossy audio compression technology, the official name is OggVorbis, it is

What is the difference between lossy and lossless headlight modification?_Ant Car Accessories

The so-called non-destructive installation is to install the lens directly on the original car headlight bulb interface without destroying the original lamp container, and tighten the lens to fix the lens with screws. The so-called lossy installation consists of drilling holes in the original lamp pot and comparing the four screw holes in the lens.

Difference between lossless compression and lossy compression?

Lossless compression is the first step without the above. Therefore, lossless compression can restore data equivalent to what it was before compression, while lossy compression cannot. The scale of “loss” in lossy compression is controllable and algorithms are used to extract information before removing it.

Can you hear the difference between lossy and lossless audio at different sample rates?

Although it is said that the human ear can only hear the sound up to 20 kHz, the 48 kHz sampling rate and the 44.1 kHz sampling rate are actually different. . . It is recommended to use the highest quality to view this video to ensure the bitrate is high enough to reduce suppression.

What is the difference between lossy compression and lossless compression?

What makes an audio format lossless?

Lossless Audio

What makes an audio format lossless?
The best audio formats for your music library

Lossless Audio

You might think of the word “lossless” as being used for audio formats that don’t use any kind of compression. However, even lossless audio formats use compression to reduce file sizes to reasonable levels.

Lossless formats use compression algorithms to save audio data so that the audio is exactly the same as the original source. This contrasts sharply with lossy audio formats like AAC, MP3, and WMA, which use algorithms that discard data to compress the audio. Audio files consist of sounds and silences. Lossless formats can compress silence to almost zero space while preserving all sound data, making them smaller than uncompressed files.
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What lossless format is commonly used for digital music?
Popular lossless formats for storing music include:

FLAC
WAV
A THE C
lossless WMA
The effect of lossless formats on music quality
If you are downloading lossless music tracks from an HD music service, you would expect the sound quality to be really high. On the other hand, if you digitize a low-quality music box using a lossless audio format, the audio quality will not improve.

What is the difference between lossless sound quality and normal sound quality?

When downloading music, we often see these options: lossless sound quality and normal sound quality, lossless sound quality requires members to download, otherwise only normal sound quality can be downloaded.

Since it is a fee, the lossless sound quality must be higher than the normal sound quality, so what are the differences between them?

Commonly seen MP3, WMA, OGG are called lossy compression. As the name suggests, lossy compression is to reduce the audio sample rate and bit rate, and the output audio file will be smaller than the original file, which is normal sound quality. we often see.

Common MP3, WMA and other formats occupy about 1M-5M of space for single-handed songs, while for music in lossless formats such as ape and flac, the space occupied by a single song can generally reach tens of megabytes, or even more than 100M.

Bit rate (Kbps) refers to the transmission rate of digital signals, that is, how many thousands of bits of information are transmitted per second (K means thousands of bits, Kb means how many thousands of bits). For music, theoretically this The higher the value, the better the sound quality. Ordinary music, such as WMA, is generally 128kbps music, MP3 is mostly 128 or 192 or 320kbps/, while the bit rate of lossless music generally reaches 800-900kbps, and traditional CD even reaches 1411 Kbps. Using lossless compression, the sound quality is the most perfect.

The feature of lossless music is that regardless of whether there is sound between the beats, its data always flows smoothly, so the fast magnetic vibration in your headphones is stable, and the sound is natural and real; while lossy formats such as MP3 are due to the loss of people The ear can not hear part of the data, so the magnetic block in the earphone vibrates unnaturally, causing it to vibrate when there is sound, and do not vibrate when there is no sound, so the magnet block vibrates excessively and unstable, which will produce burr noise. If professional equipment is used, it is easy to hear right and wrong.

Of course, whether you can hear the difference depends on the person, and there are differences in everyone’s speech recognition ability. Some professionals and people with sensitive hearing will find the difference, but for most common listeners, in fact, there is no difference between normal MP3 and FLAC lossless sound quality, and the effect is similar.

In what format and with what quality is music heard on the radio?

In what format and with what quality is music heard on the radio?

Radio most used audio file formats

In fact, we can say that there are currently two main audio formats: lossy (compressed) and lossless (uncompressed). They are classified into many types.

Radio audio file formats

Lossy takes up less disk space, but degrades the quality of the audio track. When compressed using the MPEG protocol (hence the name mp3 – mp4 for files containing video sequences), the hues and transition tones, which are barely noticeable to the ear, are cut off. This makes the file clearer, but it also degrades it. The last place is occupied by the bit rate of that file: the degree of compression of each second of the audio track. The lower the bitrate, the less space the file will occupy and the worse the quality. Thus, a composition of three minutes in mp3 with a bit rate of 320 kilobits per second will occupy up to 3 megabytes on disk; a similar composition with a 96 kilobit bit rate will occupy about 400 kilobytes.

Lossless is as close to the original analog sound as possible *, making it much loved by sound engineers. Lossless formats take up much more disk space even compared to mp3-320. Among these formats, the most common are WAV (standard), FLAC (economic), AIFF (Apple). The former is used most often.

Professional sound recording is done only in uncompressed format. Only with him do sound engineers work.

On the radio, the situation is somewhat more complicated. This is due to the peculiarities of the work of the media, namely, efficiency and commercial profitability. The use of high-capacity servers is expensive and therefore most radio stations encode audio tracks in mp3 format at a bit rate of 256 kilobits per second. However, this is typical mainly of national stations. Equipment purchased from abroad has standard configurations that assume WAV encoding.

Why are software developers focusing on WAV? Because the radio signal cannot propagate without interference. Therefore, the listener still receives a small and sometimes significantly distorted signal. Therefore, broadcasters are faced with a reasonable question: what quality of sound will the listener perceive best: distorted ideal or distorted distortion? For this reason, in Europe and the United States, the WAV standard (AIFF, if the station operates with Apple equipment) is adopted, in Russia – mp3 with a bit rate of 256 kilobits per second.

Analog data transmission is based on the physical properties of sound. The record-playback mechanism is based on the principles of human auditory perception. That is, the sound wave vibrates the membrane (by analogy with the tympanic membrane of the ear) and is fixed with a needle in the carrier in the form in which it was obtained. Reproduced, therefore, also without deviations and changes associated with digital conversion.

The Audio Files category includes compressed and uncompressed audio formats that contain a data signal and can be played by audio programs. This category also includes MIDI files, music scores, and audio project files, which generally do not contain audio data.

The most common extensions are .WAV, .AIF, .MP3, and .MID.

Lossy audio compression

Lossy audio compression

MP3: Lossy compression

I’ll start with the well-known and widely used (though not always loved) MP3 format.

Lossy audio format

This audio format is actively used everywhere and everywhere, where it is needed and where it is not needed. But this does not mean that it is not worthy of the place it occupies in its niche. Very worthy. Although he has been “sitting” in his niche for about two decades, no one has “kicked” him out of there yet. And there were many who wanted to say it. And the main favorite of them is WMA (Windows Media Audio), which was conceived by Microsoft as an alternative to MP3. As a result, it is an alternative and it is, despite the best efforts of the developers. The next character is OGG. Despite the broader possibilities than MP3, for example, it never received widespread acceptance. Although it is compatible with many operating systems. Perhaps, it is worth mentioning the AAC audio format, which was supposed to replace MP3 in the relay. Encoding quality has been improved and compression loss reduced. But Ay.

The main advantage of these formats is their small size. The downside is the loss of quality.

Different formats
In today’s world, you can find a large number of different sound extensions. Let’s remember at a glance:

MP3 (Well where without it?)
WMA
OGG
CAA
And many others
Of course, each of these formats is good, especially MP3, which is probably the most popular format. But today we are not talking about popularity. MP3 and other similar formats, no matter how good they sound, are compressed originals. And even if you set the maximum quality to 320 btrate, it still won’t be of the highest quality. It was compressed, reduced, so there will be certain losses.

Audio compression, an explanation

Audio compression can be somewhat confusing at first due to the fact that the tools to implement it often have many elements that interact with each other and can be a headache.

Added to all this is the fact that audio / sound compression is often confused with compression in terms of digital formats (MP3 for example), which is a much more complex principle.

That is why we made this guide that aims to attack the most common doubts regarding compressors. The ones I had and the ones you probably have at the moment.

Let’s move on to the important:

What are compressors?

They are essentially an automatic volume or level control.

Let me explain: They are the equivalent of the fader of a console operated by a person in real time, that person has the function of lowering the fader when the volume of an element suddenly rises excessively. All this to control the dynamic range of said element and prevent it from going out of plane.

So what the compressor does in essence is reduce the level of a signal with parameters that are set by the user and that modify how it behaves.

How do they work?

Threshold and knee audio compression
An example of an acting audio compressor showing a 4: 1 reduction contrasting it with the signal without any reduction (1: 1)

Comparing signals, that is to say: a signal enters the compressor, for example the voice we were talking about before and we set a certain level (threshold or treshold) which, if exceeded, causes the compressor to act reducing the level of said voice at the output as if it were the fader on a console.

So the compressor is all the time comparing the input signal against this threshold and reducing the signal at the output if it passes it. On the other hand, the amount of reduction at the output is not always the same, but can be modified by the user with another parameter.

What are all those knobs?

Compressors have various user-modifiable parameters that appear in the form of knobs on both digital and hardware models. Let’s see what they are:

Threshold or Treshold: we tell the compressor that if the signal goes above a certain level, it reduces it in gain. The lower the amount of signal enters the compression and therefore there will be greater reduction in gain. A detail to keep in mind is that in digital models the threshold will appear as a negative number, in essence the more negative that number is, the lower the threshold and the more signal is compressed.
Compression ratio or Ratio: here we tell the compressor to reduce the signal that exceeds the threshold by a certain proportion established by us. For example, if our signal passes the threshold by 10 decibels and we want it to decrease by 5 decibels, we put a ratio of 2: 1 (it works as a division). At higher rates, there will be a greater reduction, but also the compression may start to be noticeable, which that we generally don’t want to happen. What is sought is that it be transparent so that the listener does not realize that the signal was manipulated.

Attack or Attack: it is the time in seconds (generally in the order of milli seconds) that the compressor takes from the moment the signal passes the threshold to the complete reduction in gain that we set with the compression ratio. Keep in mind that the compressor essentially acts immediately, but it is this time that determines how it interacts with the envelope of the signal to be compressed.

Release: is the time in milli seconds that the compressor takes to return to unity gain once the signal stops being above the set threshold. In the same way that with the attack the release can modify the envelope of the sound in question and therefore is very important in the operation of the compressor.

Knee: it is a parameter found in some compressors that modifies the way in which the compressor begins to act, the name is due to the fact that the curve that describes the way in which the compressor begins to act is similar to a knee (knee in English ).
So that we understand better when we talk about soft knee we are talking about that the compressor starts to act gradually before the set threshold and reaches its compression ratio established in this way. Instead, a hard knee compressor will only act when the signal goes beyond the established threshold and therefore more aggressively.

Make up gain or output gain: is the parameter that controls the compressor’s output gain, after having activated and reduced the signal by a number of decibels. What is sought in general is that what was reduced in level is re-gained and therefore make the parts that had less volume now approach those that were compressed.

Lossless audio formats

We will show you the formats that maintain all the quality of the audio files, compressing just enough. Lossless formats tend to maintain the original quality almost totally, suffering a minimum loss of quality. In summary, they are slightly compressed so that the audio remains intact and the size on disk is smaller.

Among the Lossless formats we have:

FLAC, is a format whose algorithm is similar to ZIP or GZip, but specially designed for audio compression. While ZIP would compress a CD quality audio file from 10% to 20% of its original size, FLAC would compress it from 30% to 50% while maintaining the full quality of the source.

Monkey’s Audio (APE), like FLAC allows lossless compression, but the greatness of Monkey’s is that it compresses bit by bit, reaching data rates of up to 700kbps without any loss of quality.

Apple Lossless (ALAC) uses an MP4 container (with a .M4A extension) for its files just like the MPEG-4 AAC and is specially created for use on the iPod.

Shorten is another Lossless format with characteristics similar to Monkey’s Audio or FLAC, but using the .SHN extension and requires fewer resources for its reproduction.

WavPack uses a hybrid mode, unlike the other Lossless formats, since it uses a Lossy file, which creates a relatively small file at high quality, and a corrector file that recovers the remaining quality of the original file, resulting in an audio file at averages between Lossless and Lossy, but with the same quality as a compressed file with any other Lossless algorithm.

TTA (True Audio) is a free and free LossLess format that reduces by 30% the original size of the source audio file and uses compression / decompression in real time.

What are the advantages of listening to music in FLAC format?

The FLAC format allows us to save audio without loss of quality. This codec encodes the file with the same information that the original CD would have (which would be the WAV file).

It is an open source format (Free Lossless Audio Codec) that could be improved, thanks to its registration as an open source license.

Higher quality, especially for HiFi equipment: this format allows us to enjoy a bitrate between 900 and 1100 kbps that does not delete information as it does in the MP3, even if it is of high quality. You will notice a warmer, fuller and cleaner sound.
The information is continuous between tracks: just like on the original CD, you can listen to music without interruptions between tracks.
The music is not altered: and that is the main reason why FLAC is ideal. Well, the file you use is the same one that you would download from the CD.
The FLAC format supports unlimited sampling rates – a FLAC can reproduce frequencies of 192,000 Hz without problem.
However, all that it reduces is not gold. There are also some problems with FLACs that you should be aware of, although they are not serious at all.

Disadvantages of listening to music in FLAC format

They take up more: as a FLAC file usually takes up a little more than half of the original CD file. It is easy for an album to go to 300 MB.
Many players do not support FLAC – this is changing in a beastly way. But the industry has fought for the MP3 to the last breath and many players, radios, etc. do not yet support this standard.
That is, the disadvantages are or rather were. In the future we will have a new cleaner format, which will surely take up less space and be an evolution of FLAC. Currently, however, it is the format par excellence and the one that we should all use, although I am not sure that a new, closed format will not come out, that can cope with it before it reaches its peak.

Encoding digital audio with a loseless format?

Compressing a digital audio with loss is to reduce the size of an audio file.

Codecs are used to reduce the size of the files. Some of the operations that codecs can perform to reduce file sizes are as follows:

Reduce the bit rate of the original sound so that the audio takes up less space.
Remove sounds at frequencies that are not noticeable by the human ear.
Elimination of redundancies of the audio signal.
They can reduce the number of existing channels by transforming a surround sound to Stereo.
Reduce the number of bits per sample.
Etc.
Note: The compression process of an audio is extremely complex. In addition, each codec applies different methodologies to compress the size of an audio.

Obviously during the compression process there will be a loss in audio quality. The higher the weight reduction of the compressed file, the higher the loss of quality.

UTILITIES THAT YOU HAVE TO COMPRESS AN AUDIO

Obviously compressing an audio has certain utilities. Some of them are as detailed below:

The space needed to store the songs on our hard drive will be much smaller. Although hard drives are cheap and their storage capacity is large, it is not feasible and / or practical to store all of our songs without loss.
We can pass the audio files to third parties in a much more convenient and fast way. After compressing a music song we can pass it by email or other means without any problem.
It seems that the trend in the very near future will be to consume video and audio via streaming. Therefore the compression of video and audio is very important. If we offer a web service in which we provide streaming audio, it is essential to compress the audio to save bandwidth and so that customers can play it at home without problems.

Select the compressed audio file format

There are numerous types of compressed file format with loss. Some of the most popular are the following:

.mp3
.ogg
.wma
.m4a
.aac
Depending on the needs, it may be useful to select one format or another.

However in my case I recommend using the mp3 or ogg file format. The reasons are as follows:

The .mp3 files do not stand out for providing the best audio quality. However, the .mp3 format is the most universally extended.
Any music player is capable of playing the .mp3 file format. You cannot say the same of the other file formats.
Everyone is able to play audio in .mp3 format. Even people with little knowledge technologically speaking.
If someone does not want to use the .mp3 format because they think the quality is not enough, or because it is a proprietary format, I recommend using .ogg. In the following link you can find the advantages and disadvantages of the .ogg files with respect to the .mp3 files.
Select the audio compression codec (encoder)

Once the file format is selected we must be aware of the codec that we will use to perform the audio compression.

In the case that we want to compress in the .mp3 file format there are the following codecs:

FHC: It’s the first codec that existed. At present this codec has become obsolete. Its compression time is very high and does not support variable bit rate.

Xing: It is the fastest encoder and allows you to obtain files with a variable bit rate (VBR). However, the quality level offered by this type of encoder is lower than Blade and Lame.

Blade: Until Lame’s appearance was the best option. It is slightly slower than Xing, but the quality levels obtained are much better. Currently this host has a problem and it does not support variable bit rates.

Lame: It is available under the GNU license and is also the best host available today. It supports variable bit rates, is fast and the quality obtained is better than in the rest of the encoders.