Abstract: The method in embodiments of this application includes: A first communication apparatus obtains a first transport block. The first communication apparatus converts the first transport block into S information segments. The first communication apparatus performs pre-processing on the S information segments based on X processing modes, to obtain G information groups, where each of the G information groups corresponds to one of the X processing modes, G is an integer greater than or equal to 1. The first communication apparatus determines C to-be-encoded code blocks based on the G information groups, and a sum of sizes of the C to-be-encoded code blocks is less than a size of the first transport block. The first communication apparatus performs channel coding on the C to-be-encoded code blocks, to obtain an encoded code block. The first communication apparatus outputs the encoded code block.

Abstract: This application provides an encoding method and an encoding apparatus based on a polar code, to improve compression performance of a source sequence of a limited length. The method includes: obtaining a source bit sequence; encoding the source bit sequence by using a polar code generation matrix that is based on sub-block column transformation, to obtain a first bit sequence, where the polar code generation matrix that is based on the sub-block column transformation is determined based on a first polar code generation matrix and a transformation matrix, and the transformation matrix may achieve effect of performing sub-block column transformation on the first polar code generation matrix; and compressing the first bit sequence, to obtain a compressed bit sequence.

Abstract: Mail processing methods and a server are described. The server receives a mail reply request sent from a client, determines whether a new contact and an original attachment are present in the mail reply request, and if it determines that the new contact and the original attachment are present in the mail reply request, generates a data packet based on a predetermined rule for non-regular mails, and transmits the data packet to a destination.

Abstract: Mail processing methods and a server are described. The server receives a mail reply request sent from a client, determines whether a new contact and an original attachment are present in the mail reply request, and if it determines that the new contact and the original attachment are present in the mail reply request, generates a data packet based on a predetermined rule for non-regular mails, and transmits the data packet to a destination.

Abstract: Mail processing methods and a server are described. The server receives a mail reply request sent from a client, determines whether a new contact and an original attachment are present in the mail reply request, and if it determines that the new contact and the original attachment are present in the mail reply request, generates a data packet based on a predetermined rule for non-regular mails, and transmits the data packet to a destination.

Abstract: Disclosed are an email sending and receiving method and a terminal. The sending method comprises: submitting an email text, and packaging, by coding, the email text and a storing ID of an enclosure uploaded in advance; determining whether an email receiver is a local domain account, and if yes, storing the email into a storage server; otherwise, obtaining the enclosure from the storage server according to the storing ID of the enclosure, recoding the enclosure and the email text into an email and then sending the email to an out-of-band server.

Abstract: Disclosed are an email sending and receiving method and a terminal. The sending method comprises: submitting an email text, and packaging, by coding, the email text and a storing ID of an enclosure uploaded in advance; determining whether an email receiver is a local domain account, and if yes, storing the email into a storage server; otherwise, obtaining the enclosure from the storage server according to the storing ID of the enclosure, recoding the enclosure and the email text into an email and then sending the email to an out-of-band server.

Abstract: Mail processing methods and a server are described. The server receives a mail reply request sent from a client, determines whether a new contact and an original attachment are present in the mail reply request, and if it determines that the new contact and the original attachment are present in the mail reply request, generates a data packet based on a predetermined rule for non-regular mails, and transmits the data packet to a destination.