Can't understand the output of the exercise

Question

here is the problem:-
An audio signal is sometimes stored as a list of int values. The values represent the intensity of the signal at successive time intervals. Of course, in a program the signal is represented with an array.
Often a small amount of noise is included in the signal. Noise is usually small, momentary changes in the signal level. An example is the "static" that is heard in addition to the signal in AM radio.
Smoothing a signal removes some of the noise and improves the perceptual quality of the signal. This exercise is to smooth the values in an integer array.
Say that the original values are in the array "signal". Compute the smoothed array by doing this: Each value smooth[N] is the average of three values: signal[N-1], signal[N], and signal[N+1].
For the first element of smooth, average the first two elements of signal. For the last element of smooth, average the last two elements of signal.
here is the original data for the signal array.
int[] signal  = {5, 5, 4, 5, 6, 6, 7, 6, 5, 4, 1, 4};i had to declare another array by the name of smooth.
int[] smooth Now i am having a big problem. here is the output of the program from author point of view using the original data in signal array.
C:\>java Smooth
signal: 1 5 4 5 7 6 8 6 5 4 5 4
smooth: 3 3 4 5 6 7 6 6 5 4 4 4
C:\>i got completely lost. the original signal data is replaced by a new one but how ? if i can get a more detail explanation on this problem by anyone it would be great. so i thought to assign some duke dollars if i can understand the logic not trying to be greedy but to see who is a good teacher. thanks.
once i get a good explanation i can go ahead and start coding and see if i can achieve this. i am pretty much sure it is a simple task but author made it looks like my worst nightmare.

Answer 1

here is the problem:-
An audio signal is sometimes stored as a list of int values. The values represent the intensity of the signal at successive time intervals. Of course, in a program the signal is represented with an array.
Often a small amount of noise is included in the signal. Noise is usually small, momentary changes in the signal level. An example is the "static" that is heard in addition to the signal in AM radio.
Smoothing a signal removes some of the noise and improves the perceptual quality of the signal. This exercise is to smooth the values in an integer array.
Say that the original values are in the array "signal". Compute the smoothed array by doing this: Each value smooth[N] is the average of three values: signal[N-1], signal[N], and signal[N+1].
For the first element of smooth, average the first two elements of signal. For the last element of smooth, average the last two elements of signal.
here is the original data for the signal array.
int[] signal  = {5, 5, 4, 5, 6, 6, 7, 6, 5, 4, 1, 4};i had to declare another array by the name of smooth.
int[] smooth Now i am having a big problem. here is the output of the program from author point of view using the original data in signal array.
C:\>java Smooth
signal: 1 5 4 5 7 6 8 6 5 4 5 4
smooth: 3 3 4 5 6 7 6 6 5 4 4 4
C:\>i got completely lost. the original signal data is replaced by a new one but how ? if i can get a more detail explanation on this problem by anyone it would be great. so i thought to assign some duke dollars if i can understand the logic not trying to be greedy but to see who is a good teacher. thanks.
once i get a good explanation i can go ahead and start coding and see if i can achieve this. i am pretty much sure it is a simple task but author made it looks like my worst nightmare.