Errata for Discrete-Time Signal Processing, 3e by A. V. Oppenheim and R. W. Schafer: The following corrections were made in the second printing, which were errors found only in the first printing. Additional corrections were made in the third printing, which were errors found in both the first and second printings. Chapter 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and appendices A, B, C have various corrections. For example, on p.181, "square brackets" should be replaced with "curly braces". On p.182, the y-axis label of Figure 4.20(e) should be $ X_{d}(e^{j\Omega T_{d}}) $. On p.191, the legend of Figure 4.28 should have "a = -5" changed to "a = -". On p.199, an equation should be corrected. On p.224, the leading T in equations (4.155) and (4.157) should be removed, and $ P_{e_{a}} $ should be changed to $ \Phi_{e_{a}e_{a}} $ in equation (4.156). On p.245, the four parts of Problem 4.24 should be labeled (a), (b), (c), (d). On p.269, Problem 4.63(d) should reference Eq. (P4.63-1). On p.273, Problem 4.68 should have the second "(a)" replaced by "(b)". In Chapter 5, Figure P5.45(A) and (E) should indicate the multiplicity of the pole at z = 0. In Chapter 6, p.559, the equation number in Section 7.7.1 should be (7.95). In Chapter 8, p.639, the word "is" should be removed at the end of the fifth line. On p.644, "X[n]" should be changed to "x[n]". On p.698, the exponent in the equation for Problem 8.40 has an extra k. On p.703, Problem 8.51 should be rephrased with a description of the sequences x[n] and y[n]. In Chapter 9, the exponent in equation (9.17a) is missing a closing parenthesis. In Chapter 10, p.810, the number 54 should be removed from the sequence L. On p.829,Errata for Discrete-Time Signal Processing, 3e by A. V. Oppenheim and R. W. Schafer: The following corrections were made in the second printing, which were errors found only in the first printing. Additional corrections were made in the third printing, which were errors found in both the first and second printings. Chapter 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and appendices A, B, C have various corrections. For example, on p.181, "square brackets" should be replaced with "curly braces". On p.182, the y-axis label of Figure 4.20(e) should be $ X_{d}(e^{j\Omega T_{d}}) $. On p.191, the legend of Figure 4.28 should have "a = -5" changed to "a = -". On p.199, an equation should be corrected. On p.224, the leading T in equations (4.155) and (4.157) should be removed, and $ P_{e_{a}} $ should be changed to $ \Phi_{e_{a}e_{a}} $ in equation (4.156). On p.245, the four parts of Problem 4.24 should be labeled (a), (b), (c), (d). On p.269, Problem 4.63(d) should reference Eq. (P4.63-1). On p.273, Problem 4.68 should have the second "(a)" replaced by "(b)". In Chapter 5, Figure P5.45(A) and (E) should indicate the multiplicity of the pole at z = 0. In Chapter 6, p.559, the equation number in Section 7.7.1 should be (7.95). In Chapter 8, p.639, the word "is" should be removed at the end of the fifth line. On p.644, "X[n]" should be changed to "x[n]". On p.698, the exponent in the equation for Problem 8.40 has an extra k. On p.703, Problem 8.51 should be rephrased with a description of the sequences x[n] and y[n]. In Chapter 9, the exponent in equation (9.17a) is missing a closing parenthesis. In Chapter 10, p.810, the number 54 should be removed from the sequence L. On p.829,