MPEG-4 Audio Conformance Tools

Tool Access Tool Description Source Code AudioObjectType Audio-specific
BIFS Node
1 2 3 4 6 7 8 9 12 13 14 15 16 17 19 20 21 22 23 24 25 26 27
SSNR/CD Max. abs. difference sample

C

X1

X1

X1

X1

X1

X

X

    

X

    

X

X1

X1

X1

X

X

X1

X

  

X3

X

X

X

    

X
SSNR/CD Overall RMS value of difference signal

C

X1

X1

X1

X1

X1

X

X

    

X

    

X

X1

X1

X1

X

X

  

X

  

X3

X

X

X

    

X
SSNR/CD Average segmental SNR value of difference signal (only segments with reference signal power in the range [-50...-15] dB)

C

          

X

X

                  

X

    

X

  

X3

X

          
SSNR/CD Average cepstral distortion (only segments with reference signal power in the range [-50...-15]dB)

C

          

X

X

                  

X

    

X

  

X3

X

          
HILN Conformance criteria for noise generator and spectral noise envelope (M5773 1.1.5.3)

C (draft)

                                          

X4

            
HILN Conformance criteria for temporal noise envelope (M5773 1.1.5.4)

C (draft)

                                          

X4

            
HILN Conformance criteria for random start phase (M5773 1.1.5.5)

C (draft)

                                          

X4

            
saol_filter Template tool to measure SA Algorithmic Synthesis and AudioFX Levels

C (implemented into the SA reference software)

                  

X

    

X

                              
saol_noise Conformance criteria for Structured Audio noise generators

matlab

                  

X

    

X

                             X
switch Conformance criteria for click-free transition in AudioSwitch

matlab

                                                  

X

    
resample Conformance criteria for SR conversion in Audio Composition

matlab

                                                    

X

  
HVXC Verification of differential spectrum for "HVXC/ER_HVXC" All Voiced bitstream (hvxc_fcomp)

C

              

X3

                        

X3

              
HVXC Verification of harmonic phase initialization "HVXC/ER_HVXC" bitstream (hvxc_ini_phase)

C

              

X3

                        

X3

              
HVXC Segmental SNR measurement for "HVXC/ER_HVXC" bitstream(segsnr)

C

              

X4

                        

X4

  

X4

          
PNS PNS-1 (spectral analysis on static signal)

C/C++

  

X2

    

X2

                    

X2

    

X2

                  
PNS PNS-2 (spectral analysis on transient signal)

C/C++

  

X2

    

X2

                    

X2

    

X2

                  
PNS PNS-3 (temporal analysis on transient signal)

C/C++

  

X2

    

X2

                    

X2

    

X2

                 

-

 bit exact

-

                

X

                                      

1) for sine sweep sequences only
2) for PNS sequences only
3) for deterministic parts only
4) for stochastic parts only