Modern TV standards

1. What codec did DVB technology adopt?

		a)	MPEG-1
		b)	MPEG-2
		c)	JPEG
		d)	JPEG2000

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2. What function is not performed by DVB system?

		a)	multiplexing
		b)	synchronization
		c)	forward error control
		d)	packet switching

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3. To regenerate original signal and eliminate noise and interferences DTV signals are

		a)	protected by error correction codes
		b)	broadcasted in a way that every block is sent three times one by one
		c)	protected by parity
		d)	protected by compression codes

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4. What statement is not true?

		a)	DVB can transmit more TV programmes on one channel frequency.
		b)	DVB can provide users with higher picture quality.
		c)	DVB can also broadcast data to users.
		d)	DVB is backward compatible with ATV (Analog TV) systems.

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5. Why digital video and audio signals can be compressed?

		a)	They contain redundant information.
		b)	They contain information which can not be predicted.
		c)	They contain noise which can be removed.
		d)	Video signal can be compressed but audio signal can not!

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6. MPEG-4

		a)	provides users with video at same quality but lower bit rates than MPEG-2.
		b)	was developed for interactive systems with video storage on CD-ROMs.
		c)	provides users with video at lower quality than MPEG-2.
		d)	is only used for compression of audio signals.

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7. MPEG-2 video coder also produces P pictures (frames) which are coded

		a)	in reference to pictures which follows
		b)	in similar way like JPEG pictures
		c)	in reference to a previous pictures
		d)	in reference to previous pictures as well as pictures which follows

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8. DVB technology is used mainly in

		a)	America
		b)	Europe and America
		c)	America and Africa
		d)	Europe and Africa

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9. DVB transmitter realizes

		a)	forward error correction actions before multiplexing the programmes
		b)	signal modulation before multiplexing the programmes
		c)	MPEG coding before multiplexing the programmes
		d)	modulation before application of forward error correction codes

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10. DVB standards don't cover broadcasting TV via

		a)	cables
		b)	return channel
		c)	air
		d)	satellite

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11. What frequency band is used for transmission of DVB-T signals?

		a)	HF band, i.e. 3 - 30 MHz
		b)	VHF band, i.e. 30 MHz - 300 MHz
		c)	UHF band, i.e. 300 MHz - 3 GHz
		d)	Ku band, i.e. 12 - 18 GHz

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12. DVB-T2 and DVB-T utilize

		a)	the same modulations
		b)	the same forward error correction codes
		c)	the same data rate
		d)	different transmission medium

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13. Applying DVB technology one satellite transponder can broadcast

		a)	one TV channel (programme)
		b)	multiplex of TV and radio channels (programmes)
		c)	one radio channel
		d)	only one TV and one radio channel

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14. DVB-S2 utilizes

		a)	convolutional codes
		b)	Reed Solomon code
		c)	Convolutional and Reed Solomon codes
		d)	LDPC and BCH codes

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15. OFDM modulation and LDPC+BCH codes are implemented in

		a)	DVB-S and DVB-S2
		b)	DVB-T and DVB-T2
		c)	DVB-C and DVB-C2
		d)	DVB-T2 and DVB-C2

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16. Which statement is not correct?

		a)	DVB standard for handhelds didn't succeed because of lack of available devices.
		b)	DVB standard for handhelds didn't succeed because of lack of business model.
		c)	DVB standard for handhelds didn't succeed because 4G/LTE technology came.
		d)	DVB standard for handhelds didn't succeed because DVB-T was better technology for handhelds.

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17. Which technology doesn't provide interactive digital television?

		a)	HbbTV
		b)	GSM
		c)	DVB-MHP
		d)	smart TVs

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18. What is HBB-TV standard about?

		a)	Technology platform that seamlessly combines TV services delivered via broadcast with services delivered via broadband.
		b)	Optical disc storage drives in the area of television broadcasting
		c)	Defines interconnection, between TV and set-top box – e.g. which interface or transmission channels to use.
		d)	As the abbreviation of this standard suggests, it deals with the hybrid access to broadband internet via TV for households.

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19. What doesn't belong to the services provided by HbbTV?

		a)	enhanced teletext
		b)	video on demand (VOD)
		c)	controlling appliances by remote control
		d)	voting and games

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20. Which technologies are used by HbbTV standard for application development?

		a)	primary Java and C#
		b)	Visual Studio 2010
		c)	CSS, CSS3, JavaScript, Adobe Flash, HTML
		d)	Pascal, Delphi, python

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21. HbbTV terminal is connected to Internet by

		a)	broadcast interface
		b)	broadband interface
		c)	broadcast and broadband interface at the same time
		d)	HbbTV terminal is not connected to Internet

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22. Can HbbTV terminal start applications on a companion screen device?

		a)	yes, but a companion device must be another HbbTV terminal
		b)	yes, but a companion device must be a TV set
		c)	no
		d)	yes

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23. HbbTV terminal uses the broadcast connection for

		a)	transmission of standard TV, radio and data services
		b)	exchange of information between applications and application servers
		c)	discovery of broadcast-independent applications
		d)	synchronizing media and applications between two hybrid terminals

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