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EURASIP Journal on Audio, Speech, and Music Processing

Table 5 The effects on the three component ECVQs and coding gains

From: A memory efficient finite-state source coding algorithm for audio MDCT coefficients

Pyramidal

Threshold

ECVQ_D4

ECVQ_D2

ECVQ_D1

Gains (%)

decomposition

T b d

T a c

Ratio (%)

LSB (%)

Ratio (%)

LSB (%)

Ratio (%)

LSB (%)

 

Ω 4 a

9

30

77.395

1.403

16.769

1.873

5.837

9.883

3.0626

 

10

 

79.276

1.623

14.895

2.075

5.830

9.895

2.9917

 

12

 

82.300

2.104

11.884

2.501

5.816

9.914

2.7091

 

17

 

82.517

2.159

11.669

2.529

5.814

9.916

2.6779

 

24

 

83.410

2.403

10.785

2.673

5.805

9.925

2.5094

 

∞

 

87.733

4.947

7.728

2.672

4.539

10.129

0.9096

 

10

24

78.733

1.579

15.436

2.014

5.832

9.892

3.0123

  

27

78.836

1.588

15.333

2.025

5.831

9.893

3.0094

  

33

79.520

1.645

14.651

2.105

5.829

9.896

2.9834

  

36

79.606

1.654

14.566

2.117

5.829

9.896

2.9812

  

∞

81.651

1.917

12.624

2.363

5.725

10.062

2.7537

Ω 2 b

32

243

79.276

1.623

13.849

1.647

6.875

8.455

2.9771

 

45

   

14.542

1.880

6.183

9.363

3.0022

 

67

   

15.219

2.241

5.505

10.443

2.9449

 

75

   

15.496

2.436

5.228

10.950

2.8997

 

∞

   

17.364

6.231

3.360

12.663

1.4433

 

65

189

79.276

1.623

14.727

2.021

5.997

9.634

2.9563

  

216

  

14.776

2.036

5.948

9.707

2.9535

  

249

  

14.922

2.085

5.802

9.941

2.9929

  

257

  

14.942

2.098

5.782

9.972

2.9916

  

∞

  

15.537

2.548

5.817

10.975

2.8963

  1. aSet the thresholds of Ω2 to be T bd = 65, T ac = 243; bset the thresholds of Ω4 to be T bd = 10, T ac = 30. Meanwhile, the main FSVQ is of different thresholds in 24 kbps stereo.
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