Speakers

Name	Definition	Function	Application	Advantages	Disadvantages
Voice Recognition Device	is an ability of a computer, computer software program, or hardware device to decode the human voice into digitized speech that can be interpreted by the computer or hardware device.	Can operate a device, perform commands, or write without having to operate a keyboard, mouse, or press any buttons.	are used in many industries, including Healthcare, Military (i.e. F-16 fighter jets and helicopters), Telecommunications and Personal computing (i.e. hands free computing).	-Voice recognition system offers automatic door locking, in case the door is left unlocked by mistake. -The components are easily installed in existing devices like cell phones, ATM cards and computers, thus there is no need to arrange for special hardware. -Low-cost technology and fast identification process are some other benefits of this technology.	-Voice recognition software does make occasional mistakes, and if you are purchasing it because of dyslexia, then you may have some difficulty with the context of words like "your." - The software does not come trained understanding contexts.
Speech Recognition Device	Computer technology that enables a device to recognize and understand spoken words, by digitizing the sound and matching its pattern against the stored patterns.	can recognize discrete speech (speech with pauses between words) better than the normal (continuous) speech.	used in assistive technology for helping people in working around their disabilities and in security devices.	-Speech is a very natural way to interact, and it is not necessary to sit at a keyboard or work with a remote control. -No training required for users!	-Even the best speech recognition systems sometimes make errors. If there is noise or some other sound in the room (e.g. the television or a kettle boiling), the number of errors will increase. -Works best if the microphone is close to the user (in a phone, or if the user is wearing a microphone). More distant microphones (e.g. on a table or wall) will tend to increase the number of errors.
Speaker Dependent Recognition System	is systen that provide involving the use of a speech recognition system, during which voice utterances of the user are trained, and commands are assigned to the trained voice utterances.	can create a voice profile for each individual specific to that person’s way of speaking, and speaker independent recognition that does not require user training.	are used in many industries, offices, banks and manufactories.	- The speech recognition engine learn´ how you speak words and phrases; - It can be trained to your voice - it does require up front voice template training (usually a little as 15 minutes). - require that users enunciate samples into the system in order to tune it to their individual voices.	If the users have to repeat themselves numerous times throughout a task because the device does not hear, or hears them incorrectly, you will quickly lose any productivity gains and be left with very frustrated users.
Speaker Independent Recognition System	System that seem look like a Speaker Dependent Recognition System but working with it you dont must have previous training	Software can recognize words from most speakers with no training, in work using templates and performed the emotion recognition from the audio and visual Modalities/	are used in industries, offices, banks and manufactories	- can be used without first training -more simple in banking - do not require tuning and can recognize limited vocabularies such as numeric digits and a handful of words.	- To create reliable speaker independents templates, someone must collect and process numerous speech sample - this is a time-consuming task.
Discrete Speech Recognition System	Is system of speech recognition principle of which work consists in speaking by taking a pause between every single word.	can access function commands, such as opening files and accessing menus, with voice instructions.	are used in all types of business activities, home,offices(telephone answering).They are also used for dictation, but require a pause between each word.	-can recognise a wide vocabulary -can be customized to recognize approximately wide number of phrases and terms	-However, most users prefer to speak in a normal, conversational speed so all modern systems are capable of understanding continuous speech. - recognize only specific, well-enunciated single words. - user must still be careful to articulate each word and not slur the end of one word into the beginning of the next word.
Continuous (Natural) Speech Recognition System	It is voice recognition system that allow you to speak naturally	Can understand natural speech without pauses and is the most process intensive.	are used in all spheres of human activities – social life, work (acquisition of goods and services, voice calls,e.g.)	- can handle large vocabularies are expected to become mainstream - use connected word packages in which a specific cadence and speaking voice - caller can speak naturally to explain a problem or request a service.	- must be used after training the software.