Audio-Visual Prototyping Project

Audio (Source) Data Dictionary

# Table Name Field Name Field Definition Data Type Enumerated Values
1 audiosrc analog_digi_flag Indicator of the how this entity is describe in the METS document instance. Enumerated Type Analog, PhysDigital, FileDigital
2 audiosrc audio_block_size Size of an audio block in bytes. Large signed number NONE
3 audiosrc audio_data_encoding Structure for audio data; current known types are pulse code modulation (PCM) and SONY's DSD structure. Suggested Enumerated Type NONE
4 audiosrc base_material Base material of the source sound recording, e.g., plastic, glass, vinyl, metal, wax, polycarbonate, etc. MAVIS terms exist. SBCS(255) NONE
5 audiosrc binder Type of adhesive used to bind recording surface to base material, e.g., CA (cellulose acetate) , PVC (polyvinyl chloride) etc. MAVIS terms exist. SBCS(255) NONE
6 audiosrc bits_per_sample Number of bits per audio sample, e.g., 16, 20, 24, etc. Large signed number NONE
7 audiosrc calibration_ext_int Indicator that the calibration information is contained within the file or externally. SBCS(255) NONE
8 audiosrc calibration_location Temporary location of the calibration file if it is external, e.g. URL. SBCS(255) NONE
9 audiosrc calibration_type Type of calibration, e.g., the ITU test sequences known as CCITT 0.33.00 (mono) and CCITT 0.33.01 (stereo). SBCS(255) NONE
10 audiosrc codec_creator_app The name of the application used to apply the codec, e.g., SoundForge. SBCS(255) NONE
11 audiosrc codec_creator_app_version The version of the application used to apply the codec, e.g., 5.2. SBCS(255) NONE
12 audiosrc codec_name The name and version (or subtype) of the compression algorithm used, e.g., Frauenhofer xyz ["xyz"] is a placeholder for versioning information]. SBCS(255) NONE
13 audiosrc codec_quality Indication whether the codec is lossy or lossless. Enumerated Type Lossy, Lossless
14 audiosrc condition Narrative description of the physical condition of the item, e.g., brittle paper, sticky shed tape, chipped disc, etc. MAVIS terms exist for "condition," "side condition," and "sound quality." SBCS(2000) NONE
15 audiosrc data_rate Data rate of the audio in an MP3 or other compressed file, expressed in kbps, e.g., 64, 128, 256, etc. Large signed number NONE
16 audiosrc data_rate_mode Indicator whether the data rate is fixed or variable. Enumerated Type Fixed, Variable
17 audiosrc dimensions_depth Depth of the object in the unit of measure indicated in dimensions_unit, e.g., 7, 12. Large signed number NONE
18 audiosrc dimensions_diameter Diameter of any circular object expressed in the unit of measure indicated in dimensions_unit, e.g., 3.5, 5, 7. Large signed number NONE
19 audiosrc dimensions_height Height of the object in the unit of measure indicated in dimensions_unit, e.g., 23. Large signed number NONE
20 audiosrc dimensions_note Desciption of odd-shaped objects that cannot be described using the standard dimensions fields. SBCS(2000) NONE
21 audiosrc dimensions_unit Unit of measurement of the source object, e.g., inches. SBCS(255) NONE
22 audiosrc dimensions_width Width of any non-circular object expressed in the unit of measure indicated in dimensions_unit, e.g., 3.5, 5, 7. Large signed number NONE
23 audiosrc disc_surface Information regarding the disk surface of the analog recording, e.g., aluminium, celluloid, etc. MAVIS terms exist. SBCS(255) NONE
24 audiosrc disposition What became of the source item, e.g., reshelved on shelf number 1234, discarded, loaned to XYZ organization, destroyed, etc. SBCS(2000) NONE
25 audiosrc duration Elapsed time of the entire file, expressed using ISO 8601 syntax; see http://www.w3.org/TR/NOTE-datetime. SBCS(255) NONE
26 audiosrc equalization Equalization system inherent in source recording, e.g., FFRR (Full Frequency Range Recording), RIAA (Recording Industry Association Of America), etc. MAVIS terms exist. SBCS(255) NONE
27 audiosrc first_sample_offset Location of the first valid sound byte in the file. Large signed number NONE
28 audiosrc first_valid_byte_block Location of the first valid sound byte in the block. Large signed number NONE
29 audiosrc gauge Gauge or width of source tape, including indication of unit of measure, e.g., 8 mm, 0.5 inch, 0.25 inch, etc. MAVIS terms exist. SBCS(255) NONE
30 audiosrc generation Generation of physical source item which was digitized, e.g., studio master, original disc, preservation tape copy, etc. SBCS(255) NONE
31 audiosrc groove Groove type of audio source, e.g., standard groove, hill and dale cutting, microgroove, etc. MAVIS terms exist. SBCS(255) NONE
32 audiosrc last_valid_byte_block Location of the last valid sound byte in the block. Large signed number NONE
33 audiosrc length Length of source open-reel tape recording, including indication of unit of measure, e.g., 700 feet, 1200 feet, etc. MAVIS terms exist. SBCS(255) NONE
34 audiosrc noise_reduction Noise reduction system inherent in source recording, e.g., DA ( Dolby A), DB ( Dolby S), FL (Flat) etc. MAVIS terms exist. SBCS(255) NONE
35 audiosrc note Additional information about the audio source item. SBCS(2000) NONE
36 audiosrc num_channels Number of audio channels, e.g., 1, 2, 4, 5, etc. Large signed number NONE
37 audiosrc num_sample_frames The number of frames within an audio file. Large signed number NONE
38 audiosrc oxide Type of oxide used for the coating of a tape recording, e.g., cobalt modified, chromium dioxide, etc. MAVIS terms exist. SBCS(255) NONE
39 audiosrc phys_format Name for the physical format of the source e.g., Record, Audiocassette, etc. SBCS(255) NONE
40 audiosrc reflective_layer The substrate of an optical disk. SBCS(255) NONE
41 audiosrc sampling_frequency Rate at which the audio was sampled, expressed in kHz, e.g., 22, 44.1, 48, 96, etc. Large signed number NONE
42 audiosrc sound_channel_map Information about the channel configuration, e.g., mapping the audio channel to their intended aural position/loudspeakers. The values represent parseable compound metadata using commas as separators, e.g., 1=left_front, 2=right_front, 3=center, 4=left_ Suggested Enumerated Type NONE
43 audiosrc sound_field Indicates aural space arrangement of the sound recording, e.g., monaural, stereo, joint stereo, surround sound DTS 5.1, etc. MAVIS codes exist. Suggested Enumerated Type NONE
44 audiosrc speed Nominal speed of the source recording, including indication of the unit of measure, e.g., 1 7/8 ips, 4.75 cm/s, 15 ips, 78 rpm, 45 rpm, etc. MAVIS terms exist. SBCS(255) NONE
45 audiosrc speed_adjustment Speed actually used at playback expressed as a percentage of nominal speed, e.g., 90 or 110. Large signed number NONE
46 audiosrc speed_note Note to state actual speed as a number (73 rpm) or to state a deviation such as "corrected to C sharp pitch. SBCS(255) NONE
47 audiosrc stock_brand Manufacturer and stock number for source recording, e.g., Scotch 208, Ampex 407, Webco steel wire, Quik-cut 3215 acetate disc, etc. MAVIS terms exist. SBCS(255) NONE
48 audiosrc tape_thickness The thickness of a tape. SBCS(255) NONE
49 audiosrc time_stamp Exact location of calibration tones within a file. SBCS(255) NONE
50 audiosrc track_format Track format of a magnetic tape, e.g., full track, half track, quarter track stereo, video HiFi, etc. MAVIS terms exist as "signal format." SBCS(255) NONE
51 audiosrc tracking_type The type of tracking code, e.g., MAVIS number, actual shelf numbers, bar-code, etc. SBCS(255) NONE
52 audiosrc tracking_value Shelf number or other identifier for source, e.g., MAVIS number, actual shelf numbers, etc. SBCS(255) NONE
53 audiosrc word_size Number of bytes that comprise a single sample of audio data, which generally maps to bits_per_sample. Files with a bit depth of 24 will usually be expressed as a 3-byte word_size; however, some applications may store 24-bit audio in a 4-byte word. Large signed number NONE
1/5/04
Library of Congress
Comments: AV Prototype Coordinator (cfle@loc.gov)
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( August 31, 2010 )