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    • 2. 发明授权
    • Speculative motion prediction cache
    • 投机运动预测缓存
    • US08446955B2
    • 2013-05-21
    • US11966110
    • 2007-12-28
    • Greg SadowskiDaniel Wong
    • Greg SadowskiDaniel Wong
    • H04N7/12
    • H04N19/433H04N19/176H04N19/44H04N19/513
    • A method and apparatus to improve motion prediction in video processing systems is introduced. When a motion prediction cache completes requesting data for a current macroblock and enters an into idle state, data comprising one or more reference frames is speculatively requested, with the hope that the requested data are will be needed in a subsequent macroblock. If the speculative data is needed, then it is consumed. However, if the speculative data is not needed, then the correct data must be requested and a price is paid for an extra memory read bandwidth. In case the speculative data is the correct data for the subsequent macroblock, the effective memory read latency is reduced and the decode performance increases. The video decoder becomes more immune to memory read latency.
    • 介绍了一种改善视频处理系统中运动预测的方法和装置。 当运动预测缓存完成请求当前宏块的数据并进入空闲状态时,推测性地请求包括一个或多个参考帧的数据,希望在随后的宏块中需要所请求的数据。 如果需要投机数据,那么它将被消耗。 然而,如果不需要推测数据,则必须请求正确的数据,并为额外的存储器读取带宽支付价格。 在推测数据是后续宏块的正确数据的情况下,有效存储器读取等待时间减少并且解码性能增加。 视频解码器变得更加免于存储器读取延迟。
    • 10. 发明申请
    • Method and apparatus for managing cryptographic keys
    • 用于管理加密密钥的方法和装置
    • US20080019527A1
    • 2008-01-24
    • US11367812
    • 2006-03-03
    • Paul YounDaniel WongMin-Hank HoChon Lei
    • Paul YounDaniel WongMin-Hank HoChon Lei
    • H04L9/00
    • H04L9/3234H04L9/083H04L9/3239H04L63/06H04L63/0807
    • One embodiment of the present invention provides a system for managing keys. During operation, the system authenticates a client at a key manager. Next, the system receives a token from the client at the key manager, wherein the token is associated with a customer key, and includes a token authenticator. This token authenticator comprises one-half of an authenticator pair which is used to determine if the client is the owner of the customer key. Next, the system decrypts the token using a master key. The system then verifies a client authenticator, which comprises the other half of the authenticator pair which is used to determine if the client is the owner of the customer key. If the client is the owner of the customer key, the system sends the customer key to the client, which enables the client to encrypt/decrypt data. Finally, the client deletes the customer key.
    • 本发明的一个实施例提供一种用于管理密钥的系统。 在运行期间,系统会在密钥管理器身份验证客户端。 接下来,系统在密钥管理器处从客户端接收令牌,其中令牌与客户密钥相关联,并且包括令牌认证器。 该令牌认证器包括认证器对的一半,用于确定客户端是客户密钥的所有者。 接下来,系统使用主密钥解密令牌。 然后,系统验证客户端认证器,客户端认证器包括用于确定客户端是否是客户密钥的所有者的认证器对的另一半。 如果客户端是客户密钥的所有者,则系统将客户密钥发送给客户端,这使得客户端能够对数据进行加密/解密。 最后,客户端删除客户密钥。