AWS Multimodal Customer Feedback Pipeline: Preparing High-Quality Data for Large Models

This article introduces an end-to-end multimodal customer feedback data pipeline based on AWS services, which supports the collection, processing, and preparation of various data types such as text, audio, and images. It aims to provide high-quality training materials for generative AI and foundation model workflows. Data quality is crucial to model performance, and enterprise customer feedback data is often scattered and in different formats—this pipeline solves this transformation challenge.

Traditional data processing solutions are designed for single modalities, but interactions in real customer service scenarios often span multiple modalities (e.g., phone audio + fault screenshots + text reviews). Building an AI system that understands customer needs requires integrating multimodal information and establishing a unified semantic representation, which demands systematic engineering design from data collection to storage.

The project is based on AWS cloud-native architecture, with core phases including: 1. Multi-source data collection: Ingest from channels like audio (call recordings), text (chat logs), images (fault screenshots), and structured data (customer information), store in S3 and trigger subsequent processes; 2. Audio processing: Use AWS Transcribe to transcribe speech to text, supporting custom vocabularies and multiple languages; 3. Image processing: Convert visual content to text via Rekognition (OCR, object detection), Claude3 (deep understanding), and Textract (document parsing).

The text processing phase includes cleaning, language detection and translation, entity recognition, sentiment analysis, and topic classification; Data alignment associates multimodal data from the same interaction via time windows, customer IDs, and session IDs; Processed text is converted into vectors using embedding models (e.g., Amazon Titan) and stored in vector databases (e.g., OpenSearch) to support semantic retrieval.

The pipeline provides support for generative AI: 1. RAG system knowledge base to improve customer service response quality; 2. Domain large model fine-tuning (SFT/RLHF); 3. Intelligent analysis (product defect patterns, sentiment trends, process improvement). Typical application scenarios: intelligent customer service, VoC analysis, quality monitoring, training material generation.

The project uses serverless architecture (Lambda, Step Functions) to reduce operation and maintenance costs; Configures fault-tolerant retry mechanisms; Tracks data lineage via Glue to meet compliance requirements; Optimizes costs using S3 intelligent tiering and Lambda pay-as-you-go billing.

Limitations include strict desensitization required for privacy compliance, trade-offs in real-time performance, and room for improvement in the depth of multimodal fusion. Future directions: Introduce end-to-end multimodal large models, support stream processing, and develop automatic quality assessment modules.

This project provides a technical foundation for enterprises to use generative AI to enhance customer service, demonstrates the advantages of cloud-native architecture in handling complex pipelines and the importance of systematic engineering thinking, and offers reference implementations and architectural ideas for large model application teams.