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发明授权
US07140037B2 Signal reproducing apparatus and method, signal recording apparatus and method, signal receiver, and information processing method 有权
信号再现装置和方法，信号记录装置和方法，信号接收机和信息处理方法

Signal reproducing apparatus and method, signal recording apparatus and method, signal receiver, and information processing method
摘要：
A signal (801) of a first code string made through replacing a part of a code string of a predetermined format with dummy data is sent to code string rewriting means (1802) via code string resolution means (1801). A signal (806) of a second code string for complementing the dummy data part in the signal (801) is sent to the code string rewriting means (1802) via control means (1805) and the dummy data in the first code string is rewritten to the second code string. At the time of trial viewing/listening, a signal (802) from the code string resolution means (1801) is selected by a switch (1808), and when the second code string (806) is acquired through content purchase, a signal (803) from the code string rewriting means (1802) is selected by the switch (1808). Thus, trial viewing/listening of a content such as music is made possible while the possibility of decryption is eliminated. By acquiring a relatively small quantity of data, reproduction of a high-quality content is made possible.
摘要（中）：

通过用伪数据替换预定格式的代码串的一部分而形成的第一代码串的信号（801）经由代码串解析装置（1801）被发送到代码串重写装置（1802）。 用于补充信号（801）中的伪数据部分的第二代码串的信号（806）经由控制装置（1805）被发送到代码串重写装置（1802），并且第一代码串中的伪数据被重写 到第二个代码字符串。 在试用观看/收听时，通过开关（1808）选择来自码串解析装置（1801）的信号（802），并且当通过内容购买获取第二代码串（806）时，信号（ 803）从开关（1808）选择代码串重写装置（1802）。 因此，可以在消除解密的可能性的同时，使诸如音乐的内容的试听/收听成为可能。 通过获取相对少量的数据，可以实现高质量内容的再现。

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