Copyright infringement
Copyright infringement is the unauthorized use of copyrighted material in a manner that violates one of the copyright owner's exclusive rights, such as the right to reproduce or perform the copyrighted work, or to make derivative works that build upon it.For electronic and audio-visual media, unauthorized reproduction and distribution is often referred to as piracy. This may occur through organized black market reproduction and distribution channels, sometimes with blatantly open commercial sale (as along the sidewalks of Manhattan's notorious Canal Street), or through purely private copying or downloading to avoid paying a purchase price. With digital technology, most modern piracy involves an exact and perfect copy of the original made from a hard copy or downloaded over the internet. The illegal downloading and sharing of music in the form of mp3s is still widespread, even after the demise of Napster and a series of infringement suits brought by the recording industry against music-sharing individuals seemingly chosen by random. Promotional screener DVDs distributed by movie studios (often for consideration for awards) are a common source of piracy when movies are still in theatrical release, and the MPAA has attempted to restrict their use. Movies are also still pirated by someone sneaking a camcorder into a movie theater and secretly taping the projection.
Though many jurisdictions impose criminal penalties for certain blatant acts of piracy and may try to stop certain infringing imports at the border, copyright infringement is still mainly prosecuted through private lawsuits by the copyright holder or their licensees. When successful, these lawsuits will typically impose monetary damages against the infringer as well as injunctions against future infringing uses.
Many infringement claims involve simple cases of piracy where the copying is obvious. Others, however, are more difficult to resolve because copyright protection is not limited to exact copying. It is inevitable that creative and commercial works will take inspiration from the culture at large, and it is often challenging to determine when this "inspiration" has crossed the line into infringement. There also may be a question of whether the allegedly infringed work is even protected by copyright. Unprotected works may include, for example, compilations of facts that lack the requisite creativity to be covered by copyright, or those works that are in the public domain because the copyright term expired.
Copyright notices—often just a simple statement on the work itself of the year protection was acquired and by whom—are not always a good indication of whether or not a work is protected because most countries do not require such formalities, and so lack of notice does not mean lack of protection. Courts may also subsequently decide in the context of an infringement suit that the work did not meet the minimum criteria for copyright protection, even if the work had been previously registered by a government copyright agency. However, copyright notices give at least some indication of who to contact if permission is needed, and when a copyright will expire, though the copyright terms of preexisting works are sometimes legislatively extended (as with the Sonny Bono Copyright Term Extension Act) or even restored after expiration.
To avoid infringement claims, the right to make use of a copyrighted work can be acquired through an explicit contract or license with the author or publisher, through purchasing a lawful copy (which may provide a number of rights to the purchaser, as under the First Sale Doctrine), and for certain types of media, statutory licenses (such as for reproducing and recording musical works under U.S. copyright law). Even without going through such channels to get prior authorization for use of the copyrighted material, doctrines such as fair use or fair dealing may provide potentially broad defenses to infringement claims. The failure of a copyright holder to bring a timely lawsuit against known infringers may later block such a claim by establishing an implied license, as may other acts or omissions that could informally signal consent to use the work.
Exploitive or restrictive use of a copyright by its legal holder is sometimes informally called reverse piracy, though the legal term is copyright misuse.
For a substantial discussion of copyright infringement in the software domain, see copyright infringement of software.