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Applications for mobile cellular phones, not all advantages...

They are distributed only through official online store, so often veto competition programs and increase the difficulties of finding new applications for cellular phones. The major mobile operating systems have built shops on the desks of the terminals, which sells software. Driven by the creators themselves, Apple started the trend with the iPhone so successful that other manufacturers have copied. However, although application platforms represent a great progress in developing the mobile market, not all benefits. Closed models prevail and set their corporate branding programs, in addition to fend of competition and may overshadow them. In this situation the main victim is the user loses access to numerous developments.

The closed model that only allows you to buy applications in the store associated with the operating system has won the hand of the iPhone, after Apple experienced the same link between your media player and iTunes music store. For the user, the system is in principle more comfortable, because these businesses are integrated into the phone, on your desktop, so that access to new applications is straightforward. The software for these devices are innumerable. As minicomputers, the variety is overwhelming, as happens in the PC: video games, office applications, drawing or Internet related, among others. But a peculiarity of the terminal adds more possibilities: many programs take advantage of the geo-location through triangulation of GSM antennas, wifi or GPS receiver. The iPhone has raised more applications than any other mobile operating system, but Android has evolved quite

The iPhone has brought more applications than any other mobile operating system, the result of its commercial success, but Android, the open source system powered by Google, has evolved a lot and have Android Market. The numbers in the iPhone store are impressive. Last January it had surpassed the 3,000 million downloads of its more than 100,000 programs, according to their data. The average price of each application is around two and a half dollars, but not all are extra. Nokia (Symbian), RIM (BlackBerry for their models) and Microsoft (Windows Mobile) have also followed the footsteps of Apple, but with a significantly smaller number of applications. On the other hand, does not restrict the installation from sites other than their own, as in the case of Apple. The paradox is that Microsoft had designed an abundant number of programs before the launch of Apple's terminal, but dispersed in the style of what happens for conventional computers. Even Kindle electronic book reader from Amazon, will have its own store to expand the capabilities of the device, and Intel launched last January AppUp, trade programs for ultraportables. The movement has also become a portable game consoles, and Nintendo Dsi has its own store.

These official stores, however, have restrictions. Apple claims the power to reject applications without giving any explanation. This practice is called "filtering" and, in theory, is to debug applications of interesting trivial as to facilitate the task of finding the user. Apple displays them in the order he sees fit and according to their rating system. Apple claims the power to reject applications without giving any explanation. This has resulted in cases where useful programs have been banned despite the fact that were allowed at first, and NetShare, which shared the phone's data connection with other devices wirelessly. There have also been controversial blocking potential competitors. Apple refused permission to enter the store applications for the iPhone Google Voice, which activates a second telephone line associated with the principal, or Google Latitude, which locates the user's position on the maps. Still, a few days ago Google announced it had found an indirect formula for iPhone users could use Google Voice.

The same thing happened to the company Opera, which has seen not accept your version of Opera Mini browser for fear of competing with the iPhone's Safari. Another example is Skype, that while in 3G networks run by Symbian, iPhone OS, so as not to obscure the trade agreements with mobile operators, can only be used for wifi. In these cases, the only solution, if you use an application that Apple does not allow into their store, is to release the iPhone. It is a rather complex action which threatens the firmware of the device, so the company does not answer the phone in case of failure.

Despite Apple filtering tasks, many programs available in the shop just useful. There have been cases provocative as "I Am Rich" (I'm rich), which charged 799 euros for an application whose only use was to confirm that the buyer could spend that money and therefore make a difference in purchasing power one user to another. After authorize its publication, Apple removed it as there was controversy. It is difficult to find applications. On the other hand, it is difficult to find applications among the more than 100,000 of which has the iPhone. Apple has implemented more successfully than rivals incentives for other people, even without knowledge, create programs. To do so, publish all the kits and the necessary data for processing. An extreme example of this occurred when a boy of 11 years, admitted for several months in a hospital, took advantage of his stay to program without a background application, called iSketch, basic drawing functions.

Despite success stories, most developers just do business with their programs in such a competitive market. In this way, has created a hyper-abundance of applications, especially for iPhone, and it is an arduous task to find a specific program to perform the desired function. Not because it has not been developed, but because it can be very difficult to find. Automatic recommendation systems proposed by Apple are not very effective. Despite success stories, most developers just do business with their programs in a highly competitive market.

Unlike what happens in computers, in the segment of mobile phone applications Queen payment program. Even as Android free operating systems have not followed the dominant trend in Linux and the applications that are designed for this environment are distributed under payment. Developers take 70% of the total price of the application, while the platform gets the remainder. The model was imposed by Apple and other official stores have copied this remuneration system. BlackBerry is the only one out of this unwritten rule and shares 80% of revenue with the developers, but their applications are the most expensive.

HD Voice: new technology for the future and present.

This technology enhances audio quality of the talks and may be the new standard for telephony. The voice on the phone has a very low quality. However, until now, traditional telephony has ignored these limitations because the important thing was that messages were understandable. Now, these limitations can be overcome through the voice in high definition. This broadband technology provides a significant quality in voice communications by providing a wider range of audio frequencies. On the trade and marketing, known as HD Voice. Major mobile operators deploy and raised as an added value of their services, but will with the entry of mobile LTE (or 4G) when imposed. Despite the increased quality in the capture and transmission of audio and video on domestic technologies such as HDTV, HD recorders and Blu-Ray or equipment of high-fidelity audio, transmission speech in a traditional telephone communication has not evolved the same way.

One way of perceiving the poor sound of a phone conversation is to compare the audio quality of a call for VoIP (voice over Internet protocol), using applications like Skype or the SIP open protocol. These technologies have different formats, encoding / decoding (codec) that allow transmission of voice with a sound quality markedly superior to a conventional phone call (PSTN or Basic Telephone Network). The voice sound quality in high definition is similar to that of an FM radio or CD. The technology that makes possible the transmission of sound in a telephone call set up protocols and technology used for decades. In addition, users are so accustomed to this low quality, which is rarely perceived limitations in communication, such as difficulty in recognizing and distinguishing similar sounds, or small changes in pitch. The so-called high-definition voice, HD Voice, is a technology with a similar sound quality to FM radio or a CD, with a lower bandwidth than necessary for a basic phone call. The sound quality of a phone call today would be comparable to an AM radio station.

The weight of a phone call: The periodic variations human ear-sound-pressure between 20 Hz (hertz) and 20,000 Hz (20 kHz or kilohertz). Below 20 Hz, is the "infrasound" and over 20,000 Hz, the "ultrasound." These frequencies, most are not audible but they affect humans. With respect to perceived sound range, the higher the audio frequency range, the better the quality of recorded sound. To avoid excessive traffic of information by telephone networks, the human voice is greatly simplified and removed his shades. However, it also means higher quality data more weight. When a cell is captured in a sound signal, do not take all, but rather is a sampling of the voice, a summary of the most important characters. A sample of 7000 Hz means that every second 7000 samples are taken of the sound. Therefore, for a given sound sample, the amount of memory or space that is required to transmit the resulting data increases as does the frequency range. That is, the higher the sound quality will occupy more space. To avoid excessive traffic of information by telephone networks, the human voice is greatly simplified and eliminated its nuances. Although it covers a frequency range from 80 Hz to 11 kHz (11,000 Hz), only passed for a conventional phone call a fraction of all the sound captured in the conversation. The rest is excluded. In this way, the sound is not high fidelity, but more than sufficient for communication between two users is produced correctly and takes up little space on the transmission.

As a general rule, the higher the frequency range captured by the phone, the better the sound quality. Traditional telephony makes a sound flow sampling of 8,000 times per second and a range of audio spectrum from 200 Hz to 3.4 kHz (3,400 Hz). This amount is very low compared with the data that may include an audio track or a movie because the quality is not as central to the phone as it is in a musical composition, whose frequency range is located generally , around 44.1 kHz (44,100 Hz). This is the case of compact discs and sound cards for home computers. With respect to traditional telephony, have a transmission bandwidth and a good capacity for storing data is more important than sound quality. In addition, traditional voice telephony requires a minimum of 64 Kbps of bandwidth free for encoding and decoding of data, as for the cable networks and in the case of mobile telephony, travel encrypted.

Codec Questions and Answers: HD Voice doubles the sampling rate of traditional telephony, up to 16,000 samples per second, and increases the spectral range from 50 Hz to 7 kHz (7,000 Hz). This adds a greater depth and nuances to the sound. In addition, for the voice is different HD codecs designed to capture and transmit higher quality sound with a smaller size. These formats, encoding / decoding reduces the bandwidth required to encode and decode at 32 Kbps, half the bandwidth needed so far. One of the keys to voice HD codecs that are used and reducing the bandwidth required for decoding.

The most commonly used codecs G.772, G.722.1, MPEG-4, AAC and Low Delay Codec. The latter, developed by the Institute for Integrated Circuits from Fraunhofer (Germany), get similar sound quality to a CD, a sampling rate of 48,000 Hz per second, with a bandwidth between 48 and 64 Kbps. Users can experience the quality difference between a traditional voice call and a call made by Voice in HD, just as you are able to distinguish a recording of analog audio cassettes on a CD. This is the qualitative difference.

Chromium OS, new super operating systems on demand

Google offers public its platform to create custom operating systems. Last November, Google introduced the first version in beta testing open source project Chromium OS, the platform to accommodate the operating system source code from Google. This means that there will be a Linux-based open source available for any developer to download it to your computer and create your own version of the system. The consequence will be a wider range of free alternative to Windows and Mac OS X for handheld devices and tablet PC. The Chromium Project Web OS has different sections, as a public repository, instructions for building the operating system and design specifications or possible experiments and concepts of the graphical environment. In this way, developers can create their own adaptations of the operating system.

Zero Os Chromium is one of the first results of this strategic move by Google, which seeks to open the market for operating systems and give users more choices to the two major proprietary developments, Windows and Mac OS X. It is an adaptation of a British student to install the OS on a USB external hard drive of two gigabytes and access it natively without having to also install on your computer. Chromium page OS Zero has tutorials that explain how to install on a USB device development based on the operating system version that the user use on your computer, whether Windows, Linux and Mac OS X. In addition, also includes instructions for adding it as an option to boot the computer. Chromium Philosophy, permanent connection. This operating system comes from many users make use of your computer. That is, the light, open the browser and move throughout the day exclusively between the different tabs, with applications and online services such as email, office applications, or social networking site. Therefore, based on the premise that the main work is done on the Web and not on the desktop. It is what is known as being "net centre" versus "pc center" which has its functions on the computer and every day is more into disuse.

Chromium on the premise that the main work is done on the Web and the desktop computer. The Chromium project aims to promote two key areas: ease of use through a user friendly environment and integration with platforms and services online. It is, therefore, an operating system for devices that are permanently connected to the Internet and using local resources the user's computer, together with applications and services "in the cloud." Without a permanent Internet access, Chromium does not have available all of its functionality, since most applications are placed on the Internet and not on the computer.

A possible alternative for the IPAD?

This operating system is ideal for smaller, lighter computers with limited processor and little memory, as the main resource consumption do the servers containing the web applications. Its niche are called ultraportables or netbooks, but also other devices with appropriate hardware, such as tablets or Apple IPAD. The Chromium project's official blog, Google submitted a proposal for a tablet that uses your operating system. The sketch of the tablet, the work of a designer of the company, would have a multitouch screen with a graphical environment designed to use with fingers. Compete well with the IPAD, which in turn many analysts see as an alternative to e-book readers. If Google indeed issue a tablet of its kind, would give a physical platform to its growing online bookstore, which makes the competition sites like Amazon. The option used to test early versions of the operating system is to virtualize, ie install the system from a computer application that simulates a "clean installation, as with the program to test Linux without Wubi exit Windows. Facilitate this task different tutorials that explain step by step in English and Spanish.

Chrome OS, the idealization of Google. A code from Chromium, Google has introduced Google Chrome OS, operating system designed to work in low cost computers will be available this year. It will not be the only version. You also said that during 2011 will launch a version of Chrome OS for business. Google Chrome OS Business will benefit from features designed for use in corporate environments.

Google Chrome features have Business OS designed for use in corporate environments. Between them, have a hardware switch that provides access to a "developer mode" so that developers can modify the source code of the system and adapt to the requirements and needs of each company. This is because Chrome-based computers will have a hardware security architecture can be stored passwords and certificates. It is expected that the first low-cost PCs (netbooks) are available on the market in the last quarter of the year. Brands like Acer, Asus, HP, Lenovo and Toshiba have already confirmed working with Google to launch their proposals. Possible technical specifications that have the Chrome OS-based computers, features a 10.1 inch screen (it is possible that is multi-) with a resolution 1.280x720 pixels, ARM processors and Nvidia graphics chip. As the hard drive, SSD technology would be based on between 32 and 64 gigabytes-Chrome OS is not intended for use in mechanical hard drives, along with 2 gigabytes RAM. In the area of connectivity, will support wireless connection and there may be models with 3G connectivity.

Directories to find new applications for cellular phones and PDA

Faced with criticism that the systems are to devise new applications, have created programs for iPhone based on social networking recommendations, such as Chorus, with the views of relatives and persons in whose criterion is trust. In this line directories have also been devised which attempt to better inform of the benefits of each program and links to the download site. Mplayit does so through an application to be installed on Facebook and, in particular, on its website within this social network. Details creations for iPhone, Android, BlackBerry and Java language platform capable of operating in much of the terminals. It also introduces videos explaining their role and user feedback.

Faced with criticism that the systems are to devise new applications, have created programs for iPhone based on social networking recommendations. The iPhone has more directories devoted to other operating systems. Among them, Appstim, where applications are ranked, scored and commented; AppAdvice, which has created different lists of programs for specific purposes such as making video streaming from your phone, or Appolicious, opinions and ability to connect to Facebook to send recommendations to friends. On the other hand, takes the idea Yappler lists of Twitter users the software realm. On this site, each user lists the applications you use and share with the rest. AndroLib, for its part, made a directory intended for users of Android.

Alternative Online Stores. The closed system of selling applications has worked well for Apple. For this reason, many shops have sprung up alternatives to the iPhone, the prime example of this phenomenon. At any time, Apple might close the store to control both software and hardware on their phones. In early January YourAppShop was launched, a creator of alternative shops software for the iPhone, which claims to be the only completely legal alternative to official trade. It allows developers to charge for applications and provides all the necessary infrastructure to integrate within the terminal. With the same technology has been launched PremierAppShop, a shop with magic tricks and videos to advise on these to give more information in the purchase. For other mobile operating systems have emerged as PocketGear sites that sell directly to programs Symbian, Blackberry, Android, Palm, Windows Mobile and Java, customized for each terminal whenever possible.

Free applications on mobile. The Mozilla Foundation, creator of the popular Firefox browser, has been highlighted over the years to distribute their programs free of charge and freely licensed for different operating systems. Now, also focuses its efforts on mobile phones with a version of its flagship product tailored for these terminals, Firefox Mobile, which will have versions for mobile operating systems more popular. This software will transfer to the phone system that characterizes the Firefox add-ons for computers. Its proponents believe it to be platform can assume in practice the end of the rise of application stores, because today's browsers are the center of Internet activity, supported by the "cloud." In this way, developers could program for Firefox Mobile and get a larger potential audience, as with conventional computers. It could also be the way to avoid the blockades imposed by the promoters of the official stores only.

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