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Table 3 Search accuracy comparison among various methods

From: An efficient algebraic codebook search for ACELP speech coder

Methods

Search accuracy for locating various numbers of intended pulses (%)

1 pulse

2 pulses

3 pulses

4 pulses (all right)

0 pulse (all wrong)

G.729A

98.3475

92.1456

80.9918

68.6438

1.6525

GPR

R = 1

98.7032

90.7750

76.1053

55.0718

1.2968

R = 2

98.4946

91.8335

80.4779

76.1053

1.5054

R = 3

98.5246

92.1081

81.2227

80.4779

1.4754

R = 4

98.5283

92.1547

81.3393

81.2227

1.4717

IFPR

98.6810

92.4963

80.0048

68.0824

1.3190

RCM

N = 1

99.3295

89.0873

55.8720

17.3353

0.6705

N = 2

98.3009

90.8486

73.6532

50.3579

1.6991

N = 3

98.8545

94.0394

83.5763

70.7329

1.1455

N = 4

99.2014

95.9617

89.2187

81.8716

0.7986

Proposed method

N = 1

99.3295

89.0873

55.8720

17.3353

0.6705

N = 2

98.2054

89.8500

70.0755

44.0814

1.7946

N = 3

98.2060

91.2376

76.7365

60.2498

1.7940

N = 4

98.2369

92.1541

80.4684

69.0717

1.7631