Most embedded software in the consumer electronics is generally developed through derivation from legacy software. Many new projects are derived from preexisting ones, through modification of functionality, optimization of performance and application new features. Particularly in the digital AV (Audio & Video) domain, the rise of ?digital convergence? has lead to a need for the functionality of products to be integrated and unified across different products. In this situation, a product line approach might be more efficient and effective rather than a product-oriented approach. The characteristics of this environment make the product line approach ideal for the digital AV domain.