Direct Voice Input .pptx
- 3. • It’s a kind of Interface between the crew and a/c in high work load situation in single crew member a/c • F-16 routinely achieved 95% correct word recognition and reduced to less than 80% under high g conditions • Voice control is not suitable for time critical system.
- 4. • Recognition • Speech recognition • Synthesis • Mature and proven performer
- 5. • Applied for non critical task such as requesting system • Status, • tuning radios, • And requesting maps to be displayed on a CRT • Not been used for urgent Inputs or critical task such as firing weapons.
- 6. • The words in the vocabulary are limited. • Generating templates are time consuming. • Microphone have the same electrical characteristics as the flight microphone • Difficult to stimulate the stress artificially • Speaker independent Speech Recognition requires large amount of memory ,and low signal processing
- 7. • Correct recognition • At a rate in the mid 90 % and decreases to less than 80% for a 9-g load on the pilot • Confusion with a rhyming word • And rejection • The response time and the recognition problems can be reduced by • Syntactical rules and logic
- 9. • Node 1 is the master node • Contains all the word that are permitted to be the first word in a spoken sequence Node 2 to 4 are secondary nodes contains second words on the set of words based on the initial word and the syntactical rules. Ex: Comm1 refers radio ,so logic dictate that the words which follow are numbers representing the frequency to which the radio should be tuned
- 10. Working of speech recognition system *It uses hidden Markov modelling (HMM) *2 pattern modes: -Acoustical modelling -Language modelling
- 11. Acoustical modelling • Phonemes: a phoneme is a unit of sound that distinguishes one word from another in a particular language • In this modelling, uttered words are processed into phonemes. • English language is made with 45-50 phonemes. • Phonemes are converted to digital format • This digital format or pattern is matched with a
- 13. Commands
- 15. MFD • Collins Aerospace’s MFD-268 • Used in rugged military helicopters and fixed wing a/cs • Resolution 1024*768 • AMLCD display • Offers landscape and portrait configurations • Provides enhanced situational awareness all phases of flight
- 16. Features and benefits High quality Sunlight readable and avionics grade High brightness at broad dimming range NVIS compatible Available as video monitor Multiple video formats FLIR/ map