Audio Engineering

542 Chapter 17 an odd-even shuffl e for concealment. Clearly if any errors are fully correctable, the shuffl e is a waste of tim ...

Digital Audio Recording Basics 543 samples in a vertical direction in the deinterleave memory. When the memory is read, a single ...

Figure 17.14(b) : In addition to the redundancy P on rows, inner redundancy Q is also gener ated on columns. On replay, the Q co ...

Digital Audio Recording Basics 545 data. As it does not have to compute the error locations, the outer code can correct more err ...

546 Chapter 17 machine by listening to it, as this will not reveal whether the error rate is normal or within a whisker of failu ...

Digital Audio Recording Basics 547 Spectrum shaping is used in CD to prevent data from interfering with the focus and tracking s ...

548 Chapter 17 laterally, in order to reject the maximum amount of jitter. At each decision point along the time axis, the wavef ...

Digital Audio Recording Basics 549 Every bit period begins with a transition, irrespective of the value of the bit. If the bit i ...

550 Chapter 17 Thus the frequency generated is less than the bit rate and a result is that more data can be recorded on the disc ...

Digital Audio Recording Basics 551 Figure 17.19 shows the principle. The instantaneous data rate of the disc drive is far in exc ...

552 Chapter 17 whole number of time code frames. It is then possible to link each disc block address used during a recording wit ...

Digital Audio Recording Basics 553 on tape, so different edits can be made in the future, or simply recording the output of the ...

554 Chapter 17 44.1 kHz is obtained by recording three samples per line on 245 active lines at 60 Hz. The sampling rate is thus ...

Digital Audio Recording Basics 555 52 256 Control bit 0.3 70 0.3 0 1 Data 512 Data Figure 17.21 : Typical line of video from PCM ...

556 Chapter 17 necessary to reorder the samples prior to recording. As explained earlier, the subsequent deinterleaving breaks u ...

Digital Audio Recording Basics 557 The added complexity of the rotating heads and the circuitry necessary to control them are of ...

558 Chapter 17 Signal processing block A.D D.A Figure 17.25 : Block diagram of RDAT. ...

Digital Audio Recording Basics 559 the deinterleave process and corrected or concealed, and the time compression and any fl uctu ...

560 Chapter 17 In practice the same heads can also be used for recording, even though they are too wide. As can be seen in Figur ...

Digital Audio Recording Basics 561 The combination of azimuth recording, an active tracking system, and high coercivity tape (15 ...