A method for determining an inter-channel time difference parameter, wherein the method comprises: determining a target search complexity from at least two search complexities, wherein the at least two search complexities are in a one-to-one correspondence with at least two channel quality values; and performing search processing on a signal on a first sound channel and a signal on a second sound channel according to the target search complexity, to determine a first inter-channel time difference, ITD, parameter corresponding to the first sound channel and the second sound channel; wherein the determining a target search complexity from at least two search complexities comprises: obtaining a coding parameter for a stereo signal, wherein the stereo signal is generated based on the signal on the first sound channel and the signal on the second sound channel, the coding parameter is determined according to a current channel quality value, and the coding parameter comprises any one of the following parameters: a coding bit rate and a coding bit quantity; and determining the target search complexity from the at least two search complexities according to the coding parameter; wherein the at least two search complexities are in a one-to-one correspondence with at least two search ranges, the at least two search complexities comprise a third search complexity and a fourth search complexity, the at least two search ranges comprise a first search range and a second search range, the first search range corresponding to the third search complexity is greater than the second search range corresponding to the fourth search complexity, and the third search complexity is higher than the fourth search complexity; and the performing search processing on a signal on a first sound channel and a signal on a second sound channel according to the target search complexity comprises: determining a target search range corresponding to the target search complexity; and performing search processing on the signal on the first sound channel and the signal on the second sound channel within the target search range. determining a target search complexity from at least two search complexities, wherein the at least two search complexities are in a one-to-one correspondence with at least two channel quality values; and performing search processing on a signal on a first sound channel and a signal on a second sound channel according to the target search complexity, to determine a first inter-channel time difference, ITD, parameter corresponding to the first sound channel and the second sound channel; wherein the determining a target search complexity from at least two search complexities comprises: obtaining a coding parameter for a stereo signal, wherein the stereo signal is generated based on the signal on the first sound channel and the signal on the second sound channel, the coding parameter is determined according to a current channel quality value, and the coding parameter comprises any one of the following parameters: a coding bit rate and a coding bit quantity; and determining the target search complexity from the at least two search complexities according to the coding parameter; wherein the at least two search complexities are in a one-to-one correspondence with at least two search ranges, the at least two search complexities comprise a third search complexity and a fourth search complexity, the at least two search ranges comprise a first search range and a second search range, the first search range corresponding to the third search complexity is greater than the second search range corresponding to the fourth search complexity, and the third search complexity is higher than the fourth search complexity; and obtaining a coding parameter for a stereo signal, wherein the stereo signal is generated based on the signal on the first sound channel and the signal on the second sound channel, the coding parameter is determined according to a current channel quality value, and the coding parameter comprises any one of the following parameters: a coding bit rate and a coding bit quantity; and determining the target search complexity from the at least two search complexities according to the coding parameter; wherein the at least two search complexities are in a one-to-one correspondence with at least two search ranges, the at least two search complexities comprise a third search complexity and a fourth search complexity, the at least two search ranges comprise a first search range and a second search range, the first search range corresponding to the third search complexity is greater than the second search range corresponding to the fourth search complexity, and the third search complexity is higher than the fourth search complexity; and the performing search processing on a signal on a first sound channel and a signal on a second sound channel according to the target search complexity comprises: determining a target search range corresponding to the target search complexity; and performing search processing on the signal on the first sound channel and the signal on the second sound channel within the target search range. determining a target search range corresponding to the target search complexity; and performing search processing on the signal on the first sound channel and the signal on the second sound channel within the target search range.