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Cours Python

  1. Introduction à Python
  2. Ide Python
  3. Premier programme Python
  4. Les variables en Python
  5. Les commentaires en Python
  6. Les opérateurs Python
  7. Les fonctions en Python
  8. Structure If else... Python
  9. For While Python
  10. Formatage des chaines Python
  11. Les listes en Python
  12. Les tuples en Python
  13. Les dictionnaires en Python
  14. Les ensembles en Python
  15. POO et classes en Python
  16. Héritage en Python
  17. Les exceptions en Python
  18. Le gestionnaire des packages pip
  19. Télécharger le cours complet
  20. Les modules en Python
  21. Le module OS
  22. Module datetime Python
  23. Le module Platform
  24. Le module virtualenv
  25. Le Module PyInstaller
  26. Le module googletrans
  27. Les fichiers en Python
  28. Les fichiers ouverture & lecture
  29. Les fichiers ouverture & écriture
  30. Les fichiers CSV en Python
  31. Les Fichiers JSON En Python
  32. Fichier de configuration .ini
  33. Python & SQLite database
  34. DB Browser for SQLite
  35. Interface Graphique Tkinter
  36. Les Windgets Tkinter
  37. Bibliothèque d'images PILLOW
  38. Module de style tkinter.ttk
  39. Liste déroulante ttk Combobox
  40. le module filedialog
  41. Projet: Création éditeur de texte
  42. Bibliothèque graphique wxPython
  43. Bibliothèque graphique PyQt5
  44. Télécharger le cours complet
  45. Le module Math
  46. La bibliothèque matplotlib
  47. Le module Python statistics
  48. Bibliothèque Sympy
  49. Bibliothèques Numpy
  50. Bibliothèques Scipy
  51. Bibliothèques Pandas
  52. Bibliothèques Scikit Learn
  53. Bibliothèques TensorFlow
  54. Python Machine Learning
  55. Introduction à Django
  56. Installation de Django
  57. Premier Projet Django
  58. Interface administrateur
  59. Créer une application django
  60. Les modèles de django
  61. Templates Django
  62. Les formulaires Django
  63. Fichiers Statiques Django
  64. Upload des fichiers django
  65. Systeme Pagination Django
  66. Exercices Python: les bases
  67. Arithmétiques en Python
  68. Exercices Python: les classes
  69. Exercices sur les dictionnaires
  70. Exercices Python: les fichiers
  71. Tous les TP Python
  72. Création Editeur de Texte en Python Partie1
  73. Carnet d'adresse en Python
  74. Formation Python-partie1

Cours Java

Développement Web

  1. Introduction au langage HTML
  2. Structure d'un document HTML
  3. Mise en forme d’un document HTML
  4. Liens hypertexte
  5. Insertion d’images
  6. Les attributs de la balise BODY
  7. Les tableaux HTML
  8. Les listes HTML
  9. Les Frames HTML
  10. Les formulaires HTML
  11. Les caractères spéciaux HTML
  12. Ressources et références HTML
  13. Exercices HTML avec correction
  1. Introduction au langage CSS
  2. Propriétés d'un sélecteur
  3. La propriété Text CSS
  4. La propriété background CSS
  5. La propriété Font CSS
  6. La propriété border CSS
  7. Propriétés margin et padding
  8. Propriétés Height & Width
  9. Class et les ID CSS

Javascript Basique
  1. Introduction au langage Javascript
  2. Variables, fonctions et operateurs Javascript
  3. Les structures de contrôle et les boucles Javascript
  4. Les événements Javascript
  5. Le modèle Objet du Javascript
  6. L'objet array Javascript
Framework JQuery
  1. Introduction au Framework jQuery
  2. Premier pas avec le framework jQuery
  3. Les Sélecteurs jQuery
  1. Introduction au langage PHP
  2. Premier programme php
  3. Variables et Fonctions php
  4. Opérateurs arithmétiques et logiques
  5. Les structures de contrôle en php
  6. Les tableaux en php
  7. Control des formulaires en php
  8. Upload des fichiers en php
  9. Gestion des dossiers et des fichiers en php
  10. Colorisation syntaxique en php
  11. Cookies php
  12. Les variables globales php
  13. Sessions php
  14. Les variables php d’environnement
  15. Les classes et la poo php
  16. La librairie php_gd2 des images
  17. Lecture d’un fichier xml en php
  18. Les expressions régulières en php
  19. Moteurs de template php : smarty et fast temp…
  1. Langage MySql
  2. Introduction au langage MySql
  3. Installation du Serveur MySql
  4. Manipulation des bases de donnée MySql
  5. Manipulation desTables MySql
  6. Insértion de données MySql
  1. Installation Wordpress
  2. Modification du theme Wordpress
  3. Installation d'un plugin
  4. Gestion des catégories
  5. Gestion des articles
  6. Gestion des menus Wordpress
  7. Gestion des pages
  8. Gestion des Plugins
  9. Gestion des Widgets
  10. Gestion des Médias
  11. Gestion des commentaires
  12. Création formulaire de contact
  13. Outil Importation & exportation
  14. Gestion des extensions
  15. Réglage et paramètres
  1. Introduction à Joomla
  2. Installation Joomla
  3. Architecture de Joomla

Base de données

Math Pour Informatique

TICE & Multimédias

Utilisateurs en ligne

Users: 37 Guests, 3 Bots

Annonces Google

Python & Javascript pour les nuls !




iPod is a digital mp3 / mp4 player developed and marketed by Apple Inc., an American consumer electronics multinational corporation. During their research, Apple found that in comparison to available camcorders, digital cameras, and organizers; digital music players recorded poor sales, primarily due to their awful user interfaces. Apple wanted to do something about it and so Jon Rubinstein, Apple’s hardware engineering chief brought together a team comprising of Tony Fadell (who dreamed of a hard disk based music player), Michael Dhuey (hardware engineer), Jonathan Ive (design engineer), and Stan Ng (marketing manager). In less than a year, they designed a hard disk based music player, that had a 5 GB hard drive and capable of storing 1000 songs.

Apple’s iTunes software is utilized to operate the iPod (m3 / mp4 player). The software is compatible with all Mac systems. The operating system is stored on its hard disk. A boot loader program is contained in a NOR flash ROM chip (either 1 MB or 512 KB) which instructs the device to load the operating system from the hard disk. The iPod has a 32 MB of RAM, a portion of which is used to hold the operating system from firmware, and the rest is used to cache songs from the hard disk. Apple also invented a technology whereby the hard disk of iPod could spin up once and about 30 MB of upcoming songs could be cached into the RAM. This did not require the hard disk to spin up for every song and thereby saved battery power. Apple also introduced a Windows version of iPod, at a later stage.

The audio files that iPod (mp3 / mp4 player) supports are MP3, AAC/M4A, Protected AAC, AIFF, WAV, Audible audiobook, and Apple Lossless audio file formats. MIDI and WMA files can be played only after a convertor accomplishes conversion, for non-Digital Rights Management (DRM). Ogg Vorbis, FLAC, and other open-source audio formats are not supported at all.

Apple wanted an extremely user friendly interface and thus adopted the minimalist interface, which features only five essential buttons, namely, Menu (to access functions and to toggle the backlight); Center (for menu item selection); Play/ Pause (this also works as an off switch when held for few seconds); Skip Forward/ Fast Forward; and Skip Backwards/ Fast Reverse. An additional Hold button is provided for accidental button pressing prevention, and it can reset the iPod if it has frozen or crashed. Functions such as volume control, scrolling are handled by the usage of the rotational click wheel. Later models have some minor changes in the functions of the buttons but overall the number of buttons has remained at five.

To market this path-breaking mp3 / mp4 player, they needed a suitable futuristic name and so they hired a freelance copywriter, Vinnie Chieco, and other writers to give a name. Inspired by the movie 2001: A Space Odyssey and the dialogue “Open the pod bay door, Hal!” with reference to the context of the Discovery One spaceship and its white EVA Pods, Vinnie Chieco proposed the name of the product as iPod. The management of Apple accepted the proposed name and on 23 October 2001, the iPod was officially launched. The rest they say is history.

To enable customers to access songs of their choice, Apple opened up an online media store The iTunes Store on 29 April 2003, where individual songs could be downloaded at prices less than a U.S. dollar per song. The purchased songs can be played only on iPods. Subsequent versions of this iPod (mp3 / mp4 player) also featured video capabilities, and thus iTunes Store started selling short videos from 12 October 2005. From 12 September 2006, full-length movies were also available at the iTunes Store.

iPods have come a long way from their inception, and now the latest fifth generation iPods possess multimedia capabilities and are available in both Mac OS and Windows OS versions. Usually, if a new iPod is plugged into a Mac OS computer, then the hard disk of this mp3 / mp4 player is formatted as per the HFS+ file format, and if it plugged into a Windows OS computer, it is formatted as per the FAT32 file format. From being a digital music player, the iPod has now transformed into a digital media player.


Author Bio

This article can also be accessed in portuguese language from the News Article section of page www.polomercantil.com.br/mp3-mp4-audio-portatil.php – Roberto Sedycias works as IT consultant for PoloMercantil


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