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Onwuchekwa Testimony

Onwuchekwa Testimony

Intermediate in Multimodal, Image, Audio, Video Annotation

Nigeria flagAbuja, Nigeria
$5.00/hrEntry LevelAppenCVATLabelbox

Key Skills

Software

AppenAppen
CVATCVAT
LabelboxLabelbox
Other

Top Subject Matter

No subject matter listed

Top Data Types

AudioAudio
ImageImage
VideoVideo

Top Task Types

Action Recognition
Audio Recording
Bounding Box
Cuboid
Object Detection

Freelancer Overview

Data Annotator with 10 months of experience, accurately labeling and annotating large data sets for machine learning purposes. Expertise in CvatAi and Labelbox with a track record of efficient collaboration with data scientists and engineering teams. Demonstrated ability to provide high-quality annotations and offer valuable feedback, enhancing model training efficiency.

Entry LevelEnglishJapaneseChinese Mandarin

Labeling Experience

Appen

Appen

AppenAudioClassificationText Generation
I am working on an audio annotation project with Appen, where I listen to audio recordings and transcribe them into text. In addition to transcription, I perform speaker segmentation by labeling different participants in conversations, emotion classification ranging from neutral to happy or angry, and pitch analysis to capture changes in vocal intensity. The project involves thousands of audio clips from diverse speakers and environments, delivered through the Appen platform. Quality is ensured through strict guideline compliance, accuracy thresholds, inter-annotator agreement checks, and continuous feedback to maintain consistency, reliability, and high annotation standards.

I am working on an audio annotation project with Appen, where I listen to audio recordings and transcribe them into text. In addition to transcription, I perform speaker segmentation by labeling different participants in conversations, emotion classification ranging from neutral to happy or angry, and pitch analysis to capture changes in vocal intensity. The project involves thousands of audio clips from diverse speakers and environments, delivered through the Appen platform. Quality is ensured through strict guideline compliance, accuracy thresholds, inter-annotator agreement checks, and continuous feedback to maintain consistency, reliability, and high annotation standards.

2025

Education

N

Nnamdi Azikiwe University

Bachelor of Science, Sociology

Bachelor of Science
2014 - 2017

Work History

T

THE ALTERNATIVE BANK

Relationship Manager

Abuja
2023 - Present
A

ACRES TURNKEY PROJECTS LTD

TECHNICAL ASSISTANT (TA) TO THE MD

Abuja
2022 - 2023