The signals which are obtained by encoding each quantized signal into a digital  word is called as
a) PAM signal
b) PCM signal
c) FM signal
d) Sampling and quantization

1 Answer

Answer :

b) PCM signal

Related questions

Description : Choosing a discrete value that is near but not exactly at the analog signal level leads to a) PCM error b) Quantization error c) PAM error d) Sampling error

Last Answer : b) Quantization error

Description : In PCM encoding, quantization level varies as a function of ________ a) Frequency b) Amplitude c) Square of frequency d) Square of amplitude

Last Answer : b) Amplitude

Description : The length of the code-word obtained by encoding quantized sample is equal to a) l=log(to the base 2)L b) l=log(to the base 10)L c) l=2log(to the base 2)L d) l=log(to the base 2)L/2

Last Answer : a) l=log(to the base 2)L

Description : Which causes a quantization noise in PCM system? A. Serial transmission errors B. The approximation of the quantized signal C. The synchronization between encoder and decoder D. Binary coding techniques

Last Answer : B. The approximation of the quantized signal

Description : Which causes a quantization noise in PCM system? A. Serial transmission errors B. The approximation of the quantized signal C. The synchronization between encoder and decoder D. Binary coding techniques

Last Answer : The approximation of the quantized signal

Description : The first step in PCM is ________. A) quantization B) modulation C) sampling D) none of the above

Last Answer : sampling

Description : Quantization noise is caused by A. binary coding techniques B. serial transmission errors C. the synchronization between encoder and decoder D. the approximation of the quantized signal

Last Answer : D. the approximation of the quantized signal

Description : Quantization noise can be reduced by ________ the number of levels. a) Decreasing b) Increasing c) Doubling d) Squaring

Last Answer : b) Increasing

Description : What is the quantization signal-to-noise ratio if an 8-bit PCM code is used? A. 40 dB B. 50 dB C. 60 dB D. 65 dB

Last Answer : B. 50 dB

Description : In a PCM system the number of quantization level are 16 and the maximum signal frequency is 4 KHz the transmission bit rate is

Last Answer : In a PCM system the number of quantization level are 16 and the maximum signal frequency is 4 KHz the transmission bit rate is 32 Kbits/sec

Description : ________ is the method of encoding audio signals used in US standard 1544 kbit/s 24 channel PCM systems. A. Shannon’s law B. A-law C. Newton’s law D. Mu-law

Last Answer : D. Mu-law

Description : The most common method used for sampling voice signals in PCM systems.

Last Answer : flat top sampling

Description : The most common technique to change an analog signal to digitaldata is called __________. A) PAL B) PCM C) sampling D) none of the abov

Last Answer : PCM

Description : Steps to follow to produce PCM signal. A. Quantizing, sampling, and coding B. Sampling, quantizing, and coding C. Sampling, coding and quantizing D. Coding, quantizing and coding

Last Answer : B. Sampling, quantizing, and coding

Description : Which of the following channel provides paging signals from base station to all mobiles in the cell? a) RACH b) AGCH c) DCCH d) PCH

Last Answer : d) PCH

Description : There arethree sampling methods: __________. A) quantized, sampled, and ideal B) ideal, sampled, andflat-top C) ideal, natural, and flat-top D) none of the above

Last Answer : ideal, natural, and flat-top

Description : Quantizing noise occurs in A. PCM B. PLM C. PDM D. PAM

Last Answer : A. PCM

Description : In PCM, it converts the PAM sampled to parallel PCM codes

Last Answer : Analog-to-Digital converter

Description : In PCM system, if we increase the quantization levels from 2 to 8, the relative bandwidth requirements will:  (1) Be doubled (2) Remain same (3) Be tripled (4) Becomes eight times

Last Answer : In PCM system, if we increase the quantization levels from 2 to 8, the relative bandwidth requirements will: Be tripled.

Description : In a PCM system of telemetry, the quantization noise depends on:  (1) The sampling rate and quantization level (2) The sampling rate only (3) The number of quantization level (4) Information provided is not sufficient

Last Answer : In a PCM system of telemetry, the quantization noise depends on: The number of quantization level.

Description : 12 voice channels are sampled at 8000 sampling rate and encoded into 8 bit PCM word. Determine the rate of the data stream. a. 354 kbps b. 750 kbps c. 768 kbps d. 640 kbps

Last Answer : c. 768 kbps

Description : Which is one of the disadvantages of 2G standards? a) Short Messaging Service (SMS) b) Digital modulation c) Limited capacity d) Limited Internet Browsing

Last Answer : d) Limited Internet Browsing

Description : Which of the following is the world’s first cellular system to specify digital modulation and network level architecture? a) GSM b) AMPS c) CDMA d) IS-54

Last Answer : a) GSM

Description : What is the advantage of PTM over PAM? A. All of these B. Low sampling rate is required C. Much better noise immunity D. Simpler to generate

Last Answer : C. Much better noise immunity

Description : The process of representing Infinite set of values with a much smaller set is called a. Mapping b. clustering c. Quantization d. Sampling

Last Answer : c. Quantization

Description : Information per source is called a. A. sampling b. B. quantization c. C. entropy d. D. normalization

Last Answer : c. C. entropy

Description : An integrated circuit that performs the PCM encoding and decoding functions

Last Answer : Codec

Description : An integrated circuit that performs the PCM encoding and decoding functions

Last Answer : Codec

Description : ECE Board Exam March 1996 According to the Nyquist theorem, the sampling rate that can be used in a PCM system is ________ the highest audio frequency. A. once B. eight times C. twice D. thrice

Last Answer : C. twice

Description : A theory that establishes the minimum sampling rate that can be used for a given PCM systems.

Last Answer : Nyquist sampling theorem

Description : A theory that establishes the minimum sampling rate that can be used for a given PCM systems

Last Answer : Nyquist sampling theorem

Description : Used for transmission of PCM encoded time – division multiplexed digital signal.

Last Answer : T carriers

Description : The process of dividing an analog signal into a string of discrete outputs, each of constant amplitude, is called: (A) Strobing (B) Amplification (C) Conditioning (D) Quantization

Last Answer : (D) Quantization

Description : 2G and 2.5G CDMA operators may selectively introduce 3G capabilities at each cell without changing entire base stations and reallocate spectrums. a) True b) False

Last Answer : a) True

Description : How many users are supported in IS-95 for each 1.25 MHz? a) Eight b) Sixty four c) Sixteen d) Twenty five

Last Answer : b) Sixty four

Description : How many voice channels are supported for each 30 KHz radio channel in IS-136? a) Eight b) Thirty c) Three d) Sixteen

Last Answer : c) Three

Description : How many users or voice channels are supported for each 200 KHz channel in GSM? a) Eight b) Three c) Sixty four d) Twelve

Last Answer : a) Eight

Description : W-CDMA requires a complete change of RF equipment at each base station. a) True b) False

Last Answer : a) True

Description : In wireless distribution system __________ a) multiple access point are inter-connected with each other b) there is no access point c) only one access point exists d) access points are not required

Last Answer : a) multiple access point are inter-connected with each other

Description : What is the channel symbol rate in Bluetooth for each user? a) 270.833 Kbps b) 1 Gbps c) 100 Mbps d) 1 Mbps

Last Answer : d) 1 Mbps

Description : Should I use a higher sampling rate when encoding songs in iTunes?

Last Answer : answer:There's definitely an audible difference between 128 and 256 if you're using good equipment. In my experience, the difference is not noticeable in everyday use for most tracks. But I keep ... that certain headphones make my ears fatigued. Since you have the space, go for the higher quality.

Description : Sound in TV is modulating - (1) AM (2) FM (3) PCM (4) PM

Last Answer : (1) AM

Description : _______ is more prevalent in analog signals that have steep slopes or whose amplitudes vary rapidly. A. Peak limiting B. Quantization noise C. Granular noise D. Slope overload

Last Answer : D. Slope overload

Description : In IPv4, service type of service in header field, first 3 bits are called ______ a) Type of service b) Code bits c) Sync bits d) Precedence bits

Last Answer : d) Precedence bits

Description : A long distance telephone company that collects toll is called _________ a) LATA b) LEC c) PSTN d) IXC

Last Answer : d) IXC

Description : LATAs are connected by a company called _________ a) Land exchange carrier b) Local exchange carrier c) Local control exchange d) Land area exchange

Last Answer : b) Local exchange carrier

Description : In a wireless communication, base station is connected to central hub called _______ a) PSTN b) MSC c) CO d) PBX

Last Answer : b) MSC

Description : Group of superframes in GSM is called multiframe. a) True b) False

Last Answer : b) False

Description : Which of the following is not backward compatible with Cdma2000? a) Cdma2000 1xRTT b) Cdma2000 3xRTT c) Cdma2000 1xEV-DO d) Cdma2000 1xEV-DT

Last Answer : c) Cdma2000 1xEV-DO

Description : What are the two options provided by Cdma2000 1xEV? a) Cdma2000 1xRTT. Cdma2000 3xRTT b) Cdma2000 1xEV-DO, Cdma2000 1xEV-DV c) Cdma2000 1xEV-DT, Cdma2000 1xEV-DO d) Cdma2000 1xRTT, Cdma2000 1xEV-DV

Last Answer : b) Cdma2000 1xEV-DO, Cdma2000 1xEV-DV