VQLPN
Audio Loudness Profiler and Normalizer
Software tool for on premise and cloud tasks

VideoQ VQLPN Training Presentation

• Easy-to-use command line tool, for integrated loudness measurement and normalization
  
• Windows/Linux automated tool, suitable for workstations and cloud computing
  
• Applications: Production, post-production, transcoding, distribution
  
• It measures and normalize the audio stream loudness parameters
  
• Compliant to ITU-R BS.1770-4 (USA ATSC RP A85, EBU R128)
• Editable .INI files store test configurations and target parameters
  
• VQLPN auto-detects and process all common audio content formats
  
• It detects and sorts audio segments by types (regular audio, test tone, mute)
  
• Finally, VQLPN creates Report in JSON format suitable for large databases
  

VQLPN Report includes:


• Input and output audio files Media Info parameters
• Integrated Loudness
• Loudness Range
• True Peak level estimate
• Clipping Distortions strength estimate
• It may also include optional Momentary Loudness Profile data array

Input media file containers, codecs and formats:


• TS, M2TS, MPG, MP4, MKV, MXF, MOV, AVI (with or without video stream)
• AUDIO, AAC, AC3, EAC3, M4A, MKA, MP3, OGG, WAV, W64 (audio only formats)
• All audio codecs supported by ffmpeg
• Any bit depth, sampling rate, and bit rate
• Multi-channel formats: 1.0, 2.0, 5.1, 7.1

There are two different ways to specify the output audio file format and parameters:


• AudioFileCodec=AUTO and AudioFileExtension=AUTO means that output file codec is set equal to the input file codec, and this selection also auto-defines the associated output file extension.
• Any other string value, e.g. AudioFileCodec=AAC, means manual selection of output codec.

VQLPN provides for automated cloud-based processing and instant workflow configuration.
This tool is especially useful for multi-target streaming and format conversion applications.

Optional stand-alone utility modules:
• VQLPC Correlator
• VQLPP Plotter
• VQILM IL Meter