MODALITY corpus - SPEAKER 17 - COMMANDS C4

The MODALITY corpus is one of the multimodal database of word recordings in English. It consists of over 30 hours of multimodal recordings. The database contains high-resolution, high-framerate stereoscopic video streams and audio signals obtained from a microphone array and a laptop microphone. The corpus can be employed to develop an AVSR system, as every utterance was labelled. Recordings in noisy conditions can be used to test the robustness of speech recognition systems. The language material was based on a remote control scenario and it includes 231 words -numbers, names of months and days, a set of verbs and nouns related to a computer device control. They were read by speakers as separated words and sequences resulting in a set of 12 recording sessions per speaker. Half of the sessions were recorded in quiet conditions, the other half contained three kinds of intrusive signals (traffic, babble and factory noise). The corpus includes recordings of 42 speakers (33 male, 9 female). The participants include 20 students and staff of Multimedia Systems Department of the Gdańsk University of Technology, 5 students of the Institute of English and American Studies of the University of Gdańsk, and 17 native English speakers. The dataset consist of recordings and visual features for SPEAKER 17: sex: woman native speaker: no age: 25 The test material: COMMANDS C4 All recordings for all speakers are available at http://www.modality-corpus.org/ Sample still from the corpus(SPEAKER 17) Due to the size of the corpus (approx. 2.5 TB of data), every speaker’s recording was placed in a separate zip file of the size approx. 4-7 GB each. The recordings were organized according to the speakers’ language skills. The group A (17 speakers) consists of native-speakers. Non-native speakers recordings (Polish nationals) were placed in the Group B (25 speakers). The audio files use the Waveform Audio File Format (.wav), and contain a single PCM audio stream sampled at 44.1 kSa/s with 16-bit depth. The video files utilize the Matroska Multimedia Container Format (.mkv) in which a video stream in 1080p resolution, captured at 100 fps was placed after being compressed with h.264 codec (using High 4:4:4 profile). The ‘.lab’ files are text files containing the information on word positions in audio files, and follow the HTK label format. Each line of a ‘.lab’ file contains the actual label preceded by start and end times (in 100 ns units) e.g. : 1239620000 1244790000 FIVE which denotes the word “five”, occurring between the 123.962 s and 124.479 s of audio.Word-accurate SNR values calculated for every recording are also included in the ZIP file.

MODALITY语料库（MODALITY corpus）是一款英语单词录制类多模态数据库，总数据时长超过30小时。该数据库包含高分辨率、高帧率的立体视频流，以及由麦克风阵列和笔记本电脑麦克风采集的音频信号。由于所有语音片段均已完成标注，该语料库可用于开发音视频语音识别（Audio-Visual Speech Recognition, AVSR）系统；带噪环境下的录制数据则可用于测试语音识别系统的鲁棒性。
语料的语言内容基于遥控器操控场景，涵盖231个单词，包括数字、月份与星期名称，以及一组与计算机设备操控相关的动词和名词。录制时，参与者需分别朗读单个单词及单词序列，每位参与者需完成12组录制会话。其中一半会话于安静环境中录制，另一半则添加了三类干扰信号：交通噪声、人群杂声与工厂噪声。
该语料库共收录42位参与者的录制数据，其中男性33名、女性9名。参与者构成如下：格但斯克理工大学多媒体系统系师生共20名，格但斯克大学英美研究学院学生5名，以及17名英语母语者。
本数据集包含第17号参与者的录制数据与视觉特征：性别为女性，非英语母语者，年龄25岁。测试材料为指令集C4。
所有参与者的录制数据均可通过网址http://www.modality-corpus.org/获取。语料库样帧（第17号参与者）详见对应示例。
鉴于该语料库总数据量约为2.5 TB，每位参与者的录制数据均打包为独立的ZIP压缩文件，单文件大小约为4至7 GB。录制数据按照参与者的语言能力分为两组：A组共17名参与者，均为英语母语者；非英语母语的波兰籍参与者的录制数据归入B组，共25人。
音频文件采用波形音频文件格式（Waveform Audio File Format, .wav），包含单路脉冲编码调制（Pulse Code Modulation, PCM）音频流，采样率为44.1千采样每秒（kSa/s），位深度为16比特。视频文件采用Matroska多媒体容器格式（Matroska Multimedia Container Format, .mkv），内部封装了经h.264编码器（h.264 codec, High 4:4:4配置文件）压缩的1080p分辨率视频流，采集帧率为100帧每秒（fps）。
后缀为`.lab`的文件为遵循HTK标注格式（HTK label format）的文本文件，用于记录音频文件内单词的位置信息。每行内容依次为起始时间、结束时间（单位：100纳秒）与实际标注标签。例如：`1239620000 1244790000 FIVE`，表示单词“five”出现在音频的123.962秒至124.479秒区间内。此外，每个录制数据的逐词信噪比（Signal-to-Noise Ratio, SNR）计算值也包含在对应的ZIP压缩文件中。