Напряжение, характеризующее амплитуду сигнала в момент преобразования, хранится в аналоговой форме в течение времени, достаточного для измерения и приписывания числового значения, соответствующего величине этого напряжения. Такая операция называется квантованием. При каждой выборке формируется новое число; все они образуют непрерывный ряд данных, которыми может оперировать любая цифровая система.

Для восстановления сигнала данные подаются на цифро-аналоговый преобразователь с такой же частотой, с какой производилась выборка. Цифроаналоговый преобразователь выдает напряжение, соответствующее значению слова данных, и хранит его до поступления нового слова. Получаемый в результате сигнал является точной копией исходного колебания.

В случае неадекватной выборки возможны два типа искажения сигнала. Олин связан с частотой выборки, второй — с квантованием. В том и другом случае искажения могут быть уменьшены путем более частых выборок, но при этом потребуются более сложные системы обработки данных. Вообще говоря, полностью избавиться от искажений невозможно, поскольку аналоговый сигнал описывается непрерывной функцией амплитуды от времени, а любое цифровое представление должно быть дискретным. Однако после преобразования сигнала в цифровую форму его можно передавать или копировать любое число раз, причем в него уже не будут вноситься шумы и искажения — их останется столько, сколько было в момент преобразования.

Первый тип искажений обусловлен малой частотой выборки. Если выборка производится недостаточно часто, то в течение интервала выборки амплитуда сигнала может измениться на величину, превышающую один квант. (Квант — это наименьшая величина ступеньки, используемая для описания аналогового сигнала при его дискретизации.) Другими словами, сигнал изменяется слишком быстро; система не успеет обеспечить его точной записи. При восстановлении сигнала эти изменения остаются неучтенными и, следовательно, часть информации утрачивается. Столь быстрые изменения амплитуды вызываются теми составляющими звукового сигнала, частота которых выше половины частоты выборки. Наличие таких составляющих приводит к появлению в восстановленном сигнале гармоник, частота которых равна частоте выборки за вычетом исходной частоты. Данное явление называется наложением спектра. «Пропущенные» при выборке составляющие воспроизводятся как совершенно новые, не являющиеся гармониками исходного сигнала.



  1. I simply want to mention I’m very new to blogs and actually liked this web blog. More than likely I’m want to bookmark your website . You actually come with fantastic posts. Appreciate it for sharing your web site.

  2. I loved as much as you’ll receive carried out right here. The sketch is tasteful, your authored material stylish. nonetheless, you command get bought an impatience over that you wish be delivering the following. unwell unquestionably come more formerly again as exactly the same nearly very often inside case you shield this hike.

  3. I do enjoy the way you have presented this issue plus it does give me some fodder for thought. On the other hand, because of what precisely I have experienced, I simply just wish as the actual reviews pack on that folks remain on issue and not get started on a soap box involving some other news of the day. Still, thank you for this outstanding piece and whilst I can not necessarily go along with it in totality, I value the perspective.

  4. It’s a pity you don’t have a donate button! I’d without a doubt donate to this brilliant blog! I suppose for now i’ll settle for bookmarking and adding your RSS feed to my Google account. I look forward to fresh updates and will share this blog with my Facebook group. Talk soon!

  5. Fantastic site you have here but I was wanting to know if you knew of any message boards that cover the same topics discussed here? I’d really love to be a part of community where I can get feed-back from other knowledgeable individuals that share the same interest. If you have any recommendations, please let me know. Many thanks!

  6. You could certainly see your skills within the work you write. The arena hopes for even more passionate writers like you who are not afraid to say how they believe. At all times follow your heart.

  7. At this time it sounds like BlogEngine is the best blogging
    platform available right now. (from what I’ve read) Is that
    what you’re using on your blog?

  8. It’s very easy to find out any matter on web as compared to books, as I found this article aat this website.

    Here is my blog post … hill climb racing hack

  9. Excellent way of describing, and nice piece of writing to obtain information about my presentation subject matter, which i am going to deliver in school.

  10. Hello everybody, here every one is sharing these knowledge, so it’s fastidious to read this
    web site, and I used to pay a visit this weblog daily.

  11. I truly love your website.. Pleasant colors & theme. Did
    you build this amazing site yourself? Please reply back as I’m wanting to create my own site and
    would like to find out where you got this from or exactly what the theme is called.

    Appreciate it!

  12. Nice read, I just passed this onto a friend who was doing a little research on that. And he just bought me lunch since I found it for him smile Therefore let me rephrase that: Thank you for lunch!

  13. I like looking through a post that will make people think.
    Also, thank you for allowing for me to comment!

  14. What I like to do is record a webinar stay with an viewers, then use that
    webinar for the recorded model.

    My homepage – EverWebinar Software; https://www.facebook.com/,

  15. Unquestionably imagine that that you said. Your favourite justification seemed
    to be on the net the simplest thing to take note of. I say to you, I certainly get irked even as other folks
    think about concerns that they plainly don’t
    recognize about. You managed to hit the nail upon the highest and defined
    out the entire thing with no need side-effects , other people could
    take a signal. Will probably be again to get more.


  16. purchase cialis online australia
    cialis without prescription
    cialis vartojimas
    double cialis dosage

  17. Good response in return of this question with firm arguments and telling
    all concerning that.

  18. Hey, you used to write magnificent, but the last few posts have been kinda boring¡K I miss your tremendous writings. Past several posts are just a little bit out of track! come on!

  19. Hi, Neat post. There is a problem along with your website in internet explorer,
    may check this? IE nonetheless is the market leader and a large component to other folks will
    omit your magnificent writing due to this problem.

  20. When someone writes an artiocle he/she maintains the thought oof a user in his/her brain that how a user can understand it.
    Therefore that’s whyy this article is great.

    Here is my web-site: hotmail.com

  21. Hello, you used to write magnificent, but the last few posts have been kinda boring… I miss your great writings. Past few posts are just a bit out of track! come on!

  22. Usually I do not learn article on blogs, however I would like to say that this write-up very compelled me to take a look at and do it! Your writing taste has been amazed me. Thank you, quite great article.

  23. Thank you for the good writeup. It in fact was a amusement account it. Look advanced to far added agreeable from you! By the way, how could we communicate?

  24. Thes are genuinely great ideas in about blogging.
    You have touched some nice points here. Any wayy
    keep up wrinting.

    Also visit myy web pge :: login to hotmail

  25. Amazon announced the Kindle Fire HDX 7-inch and 8.9-inch tablets somewhat quietly late last night. According to a October. 25 ABC News report, brand new tablet from Amazon could actually be an iPad killer. That could certainly offer consumers the opportunity for plenty of great deals and some sales on tablets come this holiday shopping season. They begin shipping on March. 18, 2013.»My regular job put me in path of an unknown book around August of 2007. That book was Twilight. I never heard about it or anything about, so I turned it over and checked out the back. «Vampires!» I thought, «Cool!» I am choosing to test it and Experienced been hooked directly. I read all three books in about a week, which is much reading for somebody who doesn’t read a bunch.For the contraptions know, in real life «Tom» is twice your age, has a rash on his beer gut, and was gumming his way through a bag of bargain-brand cheese puffs when he sent the photo! Be smart; permit yourself to become cupid’s arrow pierce neural chemistry has to instead of your heart.If you might be a female, step do get to the point of sharing phone numbers, request that he share his first, may call him / her. Be sure and use local telephone blocking techniques stay away from your number from showing on Caller identification when you’re making your speak to.Or can it? Let’s get real – if to provide a even one webcam chat website around that is able to offer their services free of charge, then all specialists should be free.If you then have a Gmail account, you can use Google talk to produce similar results to Skype. Gmail provides free chat services and video/voice chat services to its users. Providing two users are online at pertaining to time, whole connect either to chat, talk or video chat as a gift.Make regarding all characteristics on the online dating ? nternet site that help to critiquing contacts; nearly all have bio pages on all consumers. Many have live free sex rooms. If you have any specific questions, suggestions, or concerns you can contact the site’s host or moderator.If you then become prompted to pay money while you’re doing this video chatting, that’s your cue to move on to the other website. Don’t fall for that «free trial» concept one. You’ll end up having fun using a website and next a day or week later, it’ll give you asked to be charged continued software.Wireless technology allows the Mac-ophile to be able to their computer’s iTunes library from any room regarding house, that isn’t Apple Airport Express with Air Tracks. It is suitable for both Windows and Mac OS Back button.Also announced was a brand netbook, the Dell Mini 10 4G. This mini laptop has just a 10″ screen, which makes it the perfect size to bring with you wherever you go. And I should know – I once bought your computer without 4G. This one, though, will mean you can surf internet for up-to eleven hours on a busy schedule.

  26. Hello.This post was extremely motivating, especially because I was browsing for thoughts on this matter last Wednesday.

  27. Good website! I really love how it is easy on my eyes and the data are well written. I am wondering how I might be notified when a new post has been made. I have subscribed to your RSS feed which must do the trick! Have a nice day!

  28. I don’t even know how I ended up here, but I thought this post was good.
    I don’t know who you are but certainly you’re going to a famous blogger if you aren’t already ;) Cheers!

  29. I like this post, enjoyed this one appreciate it for putting up.

  30. Well I sincerely liked reading it. This post procured by you is very practical for accurate planning.

  31. Thank you a lot for giving everyone an exceptionally special possiblity to read from this blog. It is usually very pleasant and packed with a good time for me personally and my office acquaintances to search your website nearly three times in a week to study the fresh issues you have got. Of course, I am also at all times satisfied for the outstanding tips you serve. Selected two ideas in this post are absolutely the best I have had.

  32. After I initially commented I appear to have clicked the -Notify
    me when new comments are added- checkbox and from now on whenever a comment is added I recieve 4 emails with the same comment.
    There has to be an easy method you can remove me from that service?
    Many thanks!

  33. I tried virtually method on net and only 1 work.

  34. I am not sure where you’re getting your info, but good topic. I needs to spend some time learning much more or understanding more. Thanks for wonderful information I was looking for this information for my mission.

  35. Pretty section of content. I just stumbled upon your web site and in accession capital to assert that I acquire actually enjoyed account your blog posts. Anyway I will be subscribing to your augment and even I achievement you access consistently quickly.

  36. Thank you for the auspicious writeup. It in fact was a amusement account it. Look advanced to more added agreeable from you! However, how can we communicate?

  37. I genuinely enjoy looking at on this website, it has got excellent articles. «The living is a species of the dead and not a very attractive one.» by Friedrich Wilhelm Nietzsche.

  38. You are really a superb webmaster. BLOGURL loading full speed is amazing. It kind of feels you are doing any unique technique. Moreover, The contents BLOGTITLE are masterwork. you’ve done a congrats in this subject! NAME

  39. I wanted to draft you the very little word to say thanks yet again on your awesome views you’ve provided in this case. This is really shockingly generous with you to allow freely just what many individuals could possibly have offered for sale for an e-book to end up making some bucks on their own, even more so considering that you might have done it in the event you desired. The guidelines also worked to become a easy way to be sure that the rest have similar passion much like my own to see very much more when it comes to this matter. Certainly there are many more fun times ahead for individuals who examine your website.

  40. Thanks , I’ve recently been searching for info approximately this subject for a long time and yours is the greatest I have came upon till now. But, what concerning the conclusion? Are you positive about the source?

  41. Faytech North America is a touch screen Manufacturer of both monitors and pcs. They specialize in the design, development, manufacturing and marketing of Capacitive touch screen, Resistive touch screen, Industrial touch screen, IP65 touch screen, touchscreen monitors and integrated touchscreen PCs. Contact them at http://www.faytech.us, 121 Varick Street,3rd Floor,New York, NY 10013,+1 646 205 3214

  42. bad credit loans no guarantor needed
    payday loans online
    holiday cash advance

  43. I was just seeking this information for a while. After six hours of continuous Googleing, at last I got it in your site. I wonder what is the lack of Google strategy that do not rank this type of informative sites in top of the list. Usually the top web sites are full of garbage.

  44. I feel that is one of the most significant info for me.
    And i am satisfied reading your article. However want to commentary on some general issues,
    The web site taste is ideal, the articles
    is in reality nice : D. Just right process, cheers

  45. Some truly fantastic articles on this web site , appreciate it for contribution.

  46. Just desire to say your article is as amazing. The clearness in your post is simply excellent and i can assume you are an expert on this subject. Well with your permission let me to grab your RSS feed to keep up to date with forthcoming post. Thanks a million and please keep up the enjoyable work.

  47. Excellent weblog right here! Additionally your web site quite a bit up fast! What host are you using? Can I am getting your associate link for your host? I wish my web site loaded up as fast as yours lol

  48. But wanna tell that this is invaluable , Thanks for taking your time to write this.

  49. This is really interesting, You’re a very skilled blogger. I have joined your feed and look forward to seeking more of your fantastic post. Also, I have shared your website in my social networks!

  50. This design is spectacular! You definitely know how to keep a reader entertained.

    Between your wit and your videos, I was almost moved to start my
    own blog (well, almost…HaHa!) Excellent job. I really
    loved what you had to say, and more than that, how you presented it.
    Too cool!

  51. Real great information can be found on weblog . «We should be eternally vigilant against attempts to check the expression of opinions that we loathe.» by Oliver Wendell Holmes.

  52. Hello here, just started to be receptive to your blog page through yahoo, and realized that it is very useful. I’ll like if you carry on this idea.

  53. Wow! This could be one particular of the most beneficial blogs We have ever arrive across on this subject. Actually Excellent. I am also an expert in this topic therefore I can understand your effort.

  54. Great goods from you, man. I have understand your stuff previous to and you’re just too wonderful. I really like what you’ve acquired here, really like what you’re stating and the way in which you say it. You make it enjoyable and you still care for to keep it smart. I can’t wait to read far more from you. This is really a tremendous web site.

  55. I have not checked in here for some time since I thought it was getting boring, but the last several posts are good quality so I guess I will add you back to my daily bloglist. You deserve it my friend :)

  56. MetroClick specializes in building completely interactive products like Photo Booth for rental or sale, Touch Screen Kiosks and Digital Signage, and experiences. With our own hardware production facility and in-house software development teams, we are able to achieve the highest level of customization and versatility for Photo Booths, Touch Screen Kiosks and Digital Signage. MetroClick, 121 Varick St, #301, New York, NY 10013, +1 646-843-0888

  57. I just need to inform you you that I am new to putting up a blog and thoroughly enjoyed your article. Quite possibly I am prone to remember your blog post . You really have great article blog posts. Like it for sharing with us your current url document

  58. It’s an awesome article for all the internet viewers; they will take advantage from it I
    am sure.

  59. Pretty nice post. I just stumbled upon your weblog and wanted to say that I have truly enjoyed browsing your blog posts. In any case I will be subscribing to your feed and I hope you write again very soon!

  60. Hello there, just became alert to your blog through Google, and found that it’s truly informative. I am going to watch out for brussels. I will appreciate if you continue this in future. Lots of people will be benefited from your writing. Cheers!

  61. Hey, I think your website might be having browser compatibility
    issues. When I look at your blog site in Ie, it looks fine but when opening in Internet Explorer, it has some overlapping.
    I just wanted to give you a quick heads up! Other then that, fantastic blog!

  62. Faytech North America is a touch screen Manufacturer of both monitors and pcs. They specialize in the design, development, manufacturing and marketing of Capacitive touch screen, Resistive touch screen, Industrial touch screen, IP65 touch screen, touchscreen monitors and integrated touchscreen PCs. Contact them at http://www.faytech.us, 121 Varick Street,3rd Floor,New York, NY 10013,+1 646 205 3214

  63. Very interesting info!Perfect just what I was looking for!

  64. I was very happy to discover this website. I need to to thank you for ones time just for this fantastic read!! I definitely liked every part of it and i also have you bookmarked to look at new stuff on your site.

  65. It’s a pity you don’t have a donate button! I’d without a doubt doknate
    to this brilliant blog! I guess for now i’ll settle
    for book-marking and adding your RSS feed to my Google account.

    I look forward to new updates and will share this website with my
    Facebook group. Chat soon!

    Here is my web page; hill climb download 2017
    - http://www.Ses6.com

  66. Very nice post and straight to the point. I don’t know if this is actually the best place to ask but do you guys have any ideea where to employ some professional writers? Thanks in advance :)

  67. Emeryeps is a SEO(Search Engine optimzation) and Internet Marketing company. They help businesses to get traffic from various search engine and online community. They have seo experts and consultants with many years of SEO Experiences. No matter where your business is located, EmeryEPS.com can help your business to secure your highly convertible leads online.

  68. Truly when someone doesn’t understand then its up to other people that they will
    help, so here it takes place.

  69. Thanks , I have recently been looking for info about this topic for a while and yours is the greatest I have discovered till now. But, what about the bottom line? Are you positive concerning the source?

  70. It’s very trouble-free to find out any topic on web as compared to
    textbooks, as I found this article at this website.

  71. Hi there, You’ve done an incredible job. I’ll definitely digg it and personally recommend to my friends. I’m sure they will be benefited from this site.

  72. Merely wanna tell that this is handy , Thanks for taking your time to write this.

  73. Fantastic site. Lots of useful information here. I¡¦m sending it to a few pals ans additionally sharing in delicious. And obviously, thanks for your effort!

  74. I like this weblog so much, saved to favorites. «American soldiers must be turned into lambs and eating them is tolerated.» by Muammar Qaddafi.

  75. Hеllo, I thіnk ʏⲟur blog mighut be haᴠing browѕеr compatibility
    issսes. When I look at youhr blogg in Firefox, іt looks fine but when opеning inn
    Internet Explorer, it haѕ some overlapping. I just wanted to give you a quіck heaԀs up!
    Other then that, wonderful blog!

    Also visit my webpage: nds Ԁecorwtive grates – http://www.thetravelstreet.Com,

  76. Hello to every , because I am truly keen of reading this website’s post
    to be updated daily. It contains nice data.

  77. Faytech North America is a touch screen Manufacturer of both monitors and pcs. They specialize in the design, development, manufacturing and marketing of Capacitive touch screen, Resistive touch screen, Industrial touch screen, IP65 touch screen, touchscreen monitors and integrated touchscreen PCs. Contact them at http://www.faytech.us, 121 Varick Street,3rd Floor,New York, NY 10013,+1 646 205 3214

  78. I like what you guys are up too. Such clever work and reporting! Keep up the excellent works guys I have incorporated you guys to my blogroll. I think it will improve the value of my web site :) .

  79. Wow, incredible blog layout! How long have you been blogging for? you made blogging look easy. The overall look of your website is great, let alone the content!

  80. I have not checked in here for a while because I thought it was getting boring, but the last several posts are great quality so I guess I¡¦ll add you back to my daily bloglist. You deserve it my friend :)

  81. Hey, you used to write magnificent, but the last several posts have been kinda boring… I miss your super writings. Past several posts are just a bit out of track! come on!

  82. I have been absent for some time, but now I remember why I used to love this website. Thanks , I will try and check back more frequently. How frequently you update your site?

  83. I think this is one of the most important info for me. And i am glad reading your article. But should remark on some general things, The website style is great, the articles is really excellent : D. Good job, cheers

  84. It is perfect time to make some plans for the future and it is time to be happy. I have read this post and if I could I want to suggest you some interesting things or tips. Perhaps you could write next articles referring to this article. I wish to read even more things about it!

Оставить коментарий